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Fuel Additives

28K views 53 replies 17 participants last post by  RL Lemke 
#1 ·
I will continue to use Amsoil and RXP as my additives of choice.

In an effort to better understand the topic I have come across some information I think is interesting. This is more info than many of you are interested in. Regardless, I think it is important to use gasoline additives because of the crud, ethanol and well know need for good detergent additives.

(I bought gas at Costco where they say they now add 5X the EPA minimum detergent.)

Please be aware that the formula found in various additives have changed.


Seafoam is:

50% light hydrocarbon oil (pale oil); (Lubricant)
30% petroleum naphtha; (varnish dissolver/decarbonizer)
10% isopropyl alcohol; (drying agent)
10% water.


AMSOIL P.i. Performance Improver is:

Component CAS# Weight% Carinogen
Hydrocarbon solvent………………Confidential………………………44.4 – 53.6%…………………N/E
Polyether amine……………………Confidential………………………27.7 – 36.9%…………………N/E
Petroleum Naphtha…………………64742-94-5……………………....9 – 4.5%……………….……N/E
Substituted Aliphatic amine………Confidential…………………….….9 – 4.5%………….…………N/E
Naphthalene…………………………91-20-3……………………………..0.2%…IARC Suspect Carcinogen NTP Carcinogen

Interesting Amazon review:
Amazon.com: Glenn Carpenter's review of

Short version:

Among all fuel system cleaners I'm aware of, Redline SI-1 contains the highest quantity per dollar (based on manufacturer MSDS) of the critical fuel-system-cleaning compounds known as polyether amines (PEA). Primarily for this reason I believe SI-1 to be the best available and most cost-effective fuel system cleaner product at retail pricing. [...].

In my case it has not been necessary to use Redline's recommended quantity of approximately 3 oz per fill-up. The effects of 1 oz per fill-up are indistinguishable in terms of tested results (see my basis for this statement below). This results in an approximate cost of $0.35/tank or less than a tenth of a penny per mile. A full case at this usage rate is enough to treat 180 full tanks of fuel or to last approximately 80,000 miles. (Figures based 15gal/tank, 25-35mpg).

Long version:

As far as I know, every effective fuel system cleaner on the market uses a class of compounds known as polyether amines (PEA), in varying proportions, to effectively clean deposits from fuel system components, and particularly from fuel injectors, which can quickly impact engine efficiency and performance when not operating correctly. My understanding is that these compounds were first developed by Chevron and sold under the Techron name, and have since been made available to other blenders of fuel treatment products. Until recently BG 44K, Chevron Techron Concentrate, Gumout Regane Fuel System Cleaner, Amsoil P.I. Performance Improver Concentrate, and Redline SI-1 (among others) listed polyether amines on their Material Safety Data Sheets (MSDS) in proportions varying from approximately 25% to 50%. Most of these products no longer list PEA on their MSDS, having changed their terminology to disguise the precise nature of their products' constituent components. Whether PEA is still contained in those products is a matter of uncertainty. As of this writing Redline's SI-1 MSDS still specifies that the product contains 30-50% PEA. Consequently it is one of the few remaining fuel system cleaner products that undoubtedly does contain PEA in significant quantity.

I have been able to test the efficacy of fuel system cleaners in one of my own vehicles using a method I stumbled on after having its injectors professionally cleaned while out of the vehicle. The car in question uses a Bosch engine management system that reports fuel injector data to an on-board computer, which then uses that data to calculate and report instantaneous and average mpg to the driver. I noted after the professional cleaning that the accuracy of the reported mpg, when used to measure average mpg over each full tank of fuel, improved suddenly from a prior error of around -3% - -5% (that is, the reported mpg was ~3-5% below the actual mpg, or typically just over 1mpg low) to an error as close to zero as I could measure (that is, usually between -1% and 1%, fluctuating above and below a perfect "match"). This can be explained on the basis that the engine management system will compensate for a dirty injector by holding the injectors open slightly longer during each combustion cycle, in order to admit the proper amount of fuel. The on-board computer interprets that as a slightly higher rate of fuel consumption, reporting a lower-than-actual mpg figure.

After several thousand miles - not long - the perfect mpg accuracy I'd noticed began to deteriorate, likely indicating that the cleaned injectors were beginning to suffer from some sort of renewed impedance to fuel flow. Out of a desire to retain near-perfect injector performance, and also out of curiosity, I started experimenting with various commercially-available fuel system cleaners and keeping records of the results at each fill-up.

Leaving out the long details, I'll simply say here that the results were surprisingly clear and unambiguous. Each time I went several tanks without using a fuel system cleaner (usually as a result of simply forgetting to use it or not taking the trouble), the on-board computer (OBC) accuracy would deteriorate. This would fluctuate from tank to tank, of course, as a result of inevitable measurement errors, but the trend was very clear even over a small number of fill-ups. Returning to the use of a fuel system cleaner (Chevron Techron Concentrate, Gumout Regane or SI-1, all of which at the time did contain PEA), the accuracy would improve again very quickly - within 2-3 fill-ups. I began using the SI-1 exclusively seven months ago based on its apparent cost-effectiveness and since then I have reduced the quantity I use in each tank to the current 1oz per ~15gal fill-up. The results remain unambiguous. If I use this small amount of SI-1 consistently, the accuracy of the on-board computer is excellent, with an average error of below 1%, or a fraction the error rate seen when not using such a product.

Based on the above I feel I can confidently conclude that SI-1 works very well, even at reduced treatment rates, at keeping fuel injectors clean. Fuel system types and injectors will vary, and other parts of the fuel system - for example intake valves and combustion chambers - might benefit from higher treatment rates (or, conceivably, might not benefit at all). Actual engine efficiency will not vary nearly as much as injector cleanliness, since the engine feedback system normally corrects for imperfect injector flow rates. However, as the flow is more greatly impeded, or impeded differentially among the individual injectors, mpg will be affected to some degree. I feel it is well worth the tiny cost to consistently use a small quantity of SI-1. Other benefits, such as to combustion efficiency as a result of combustion chamber cleanliness, to volumetric efficiency as a result of intake valve cleanliness, and to fuel system lubrication, probably exist as well although I can not evaluate them and have not attempted to do so. Other fuel system cleaners may work as effectively, or nearly as effectively, but I do not believe them to be as good in terms of value per dollar spent.

In my experimentation I did try some less expensive fuel system cleaners, those not containing PEA. They appeared to have no effect. I can not categorically state that only PEA-containing fuel system cleaners work, of course, but my observations did match the conventional wisdom on this point. I also experimented with using top-tier fuels only, without any additional fuel system cleaners. The results were the same as when using non-detergent (Costco and others) fuels. I don't doubt that top tier fuels contain small amounts of cleaners and will keep a fuel system functionally and acceptably clean, but the quantities involved are reputed to be tiny and my observations seem to indicate that even a small amount of additional additive is far more effective.


The Amsoil Quickshot new MDS is hard to get at all the ingredients. It appears that the above review is right, the new MDS info hides what is really going inside the bottle. http://www.amsoil.com/msds/aqs.pdf

From another site:

I used to search for fuel cleaners just like you and people from BITOG discuss them a lot. From what I learned is, the % of PEA in fuel cleaners is important. Chevron Techron Concentrate contains 32% PEA, other known fuel system products containing PEA include the following:

* Gumout Regane (30-40% PEA content based on published MSDS data; about $5 for 12oz. bottle)
* Redline SI-1 (30-50% PEA based on MSDS data; about $9 for 15oz. bottle)
* Amsoil Performance Improver (28-37% PEA based on MSDS data; $10 for 12oz. bottle)
* BG Products 44K (unknown PEA content since they reformulated).

(I saw somewhere that the current amount of PEA in Techron is unknown.)


Amsoil info on their fuel injector cleaner: http://www.sinwal.com/data/g2543.pdf

Interesting info from Bob the Oil Guy:

From a Miata owners ingredient study of some common injector cleaners from MSDS information; http://www.jhodson.net/miata99/inj-cleaners.txt

"I made this file to show the differences between Injector cleaners.
Some cost $2 others cost $13, the mid priced bottles are a best buy.
This method does not come close to sending all your injectors for a clean and balance.

Most cheap injector cleaners are just
pure kerosene or alcohol., like $2 GumOut.

Some MSDS forms say trade secret, but tell what chem. that is not toxic and would clean an injector?
The top brands , tell the truth here.


MSDS data:
-------------------------------------------------------------------------------------------------


Techron Concentrate
Distillates, hydrotreated light < 50 %weight Aka: Paint thinner(oil based)
Stoddard solvent < 35 %weight Aka: dry clean solvent, white solvent
Solvent naphtha, light aromatic 5 - 10 %weight : zippo lighter fluid
Benzene, 1,2,4-trimethyl- 95-63-6 1 - 5 %weight : powerful toxic solvent
Xylene , powerful solvent


Techron is naptha and 3 kinds of benenze.
-------------------------------------------------------------------------------------------------------
GUM OUT INJECTOR CLEANER (WINTER GRADE)

Chemical Percent
Trade secret or proprietary formula < 1 ( secret #1)
Petroleum distillate(s) (unspecified) 40-70 ( most likely paint thinner)
Detergent/Inhibitor mixture 1-10 ( secret #2 )
Isopropanol 30-50 (rubbing alcohol, GAS DRYER "CH3CHOHCH3")

I can not begin to guess why we need more alcohol when all gas has it already.
Gasoline, must contain 2% oxygen by weight, in most smog chocked areas of the USA.

-------------------------------------------------------------------------------------------------------




Seafoam ingredients:
1 PALE OIL 4229 40-60% = A base or process oil refined until its color = yellow.
2 NAPHTHA 20 25-35% solvent powerful , common in all good injector cleaners. Zippo juice !
3 IPA 125 10-20% = Isopropyl Alcohol (rubbing alcohol), Useless in gas , cuz it already has tons.

in my opinion , putting oil into your gasoline is not too smart. Think about it?
fouls plugs, makes lots of carbon , and messes up OXy sensors. You decide.
---------------------------------------------------------------------------------------------------------

"GM TEC" ingredients:

2-BUTOXYETHANOL, a paint and ink solvent , used even in Clorox cleaner 409
Naptha, , raises octane rating of gas, , simular to Zippo ligher fluid. Coleman camp fuel.
4-METHYL-2-PENTANOL, (aka:Methyl isobutyl carbinol) used as a lacquer paint tinner
9-OCTADECENDIC ACID.(aka:Oleic acid, found in Olive oil) ( this acid is interesting)


--------------------------------------------------------------------------------------------------------------
BG-44k: ( madly popular but little different than old Chevron Techron)

Light Aromatic Solvent Naphtha , ( Zippo lighter fluid)

1, 2, 4-Trimethylbenzene , commonly found in up to 7% by volume already in Gasoline.

Xylene ,(1,2-dimethylbenzene & 1,3-dimethylbenzene & 1,4-dimethylbenzene), xylol , powerful solvent

Cumene ,(isopropylbenzene, ) powerful solvent,raises octane of gasoline.
-----------------------------------------------------------------------------------------------------------
GUNK , RADIATOR SPECIALTY COMPANY, FUEL INJECTION AIR INTAKE CLEANER

2-Propanone 30-60 % aka: Acetone
Ethylbenzene >10 % a powerful solvent
Hydrotreated Heavy Paraffinic Distillate 1-10 % weak solvent
Methanol 1-4% , solvent.
Propane 10-30% , gas
Toluene 15-45% ,powerful solvent
Xylene (mixed isomers) 5-20%
--------------------------------------------------------------------------------------------------------
Red Line SI-1
1-5% Alkenylamine - (a detergent ,even used sometimes,in baby shampoo)
1-10% Isoctanol - ( C8H18O , aka, 2-ethylhexan-1-ol, or Octyl alcohol)
1-10% 1,2,4 Trimethylbenzene , (C9H12 )
5-20% Aliphactic Napthta , zippo lighter fluid. , aka: white gas, low octane)
--------------------------------

Valvoline Complete Fuel System Cleaner
52 - 62% Kersosene
28-38% Light hydrotreated petroleum distillate
6-16% Stoddard Solvent ( stoddard is the name of the man who invented dry cleaning)


Warning, some of the chemical names have 20-30 synonyms."
 
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#2 ·
Interesting. Off tour tonight. Riding NorCal this weekend I had a buddy on a '10 K1300S stalling often when downshifting to set up for a corner, 92F, 4800' ASL. Escorted her down to Ozzies BMW in Chico Saturday morning (great shop, great techs!)
They sold her the BMW injector cleaner...Familiar container: Yup! Techtron, relabeled 'BMW'.
They re-flashed the CPU on her Canadian bike to "hopefully better deal with our crap-gas", but the point is that BMW is "endorsing" Techtron.
 
#3 ·
Ok, I have finally figured it out!! RL works for a "Think Tank" in a remote part of Texas and is leaking vital information to K 1600 owners!!

I all seriousness, I appreciate the information you bring to the forum as it is very valuable information and education of what can help us take care of our machines even better. I for one have not been very good about researching these topics that affect our machines and our wallets by what we purchase, that works or doesn't work. You've done the leg work and sharing that is valuable to all forum members.

Thanks RL.
 
#4 ·
For my money here is what I would look for on store shelves:

Amsoil because it has a good PEA content as well as the strong solvents. Be careful here because this stuff will eat any alternative bottle. I know this 1st hand.

Techron because it is well regarded and widely available. Even at Walmart.

Red Line because it appears to have a big PEA content too.

I would avoid the rest of the numerous offerings because they are either cheap substitutes or may damage the oxygen sensor of catalytic converter.

It does appear that we need to add the highly toxic solvents to clean the injectors. Please be careful, don't touch and don't breath.
 
#7 ·
Due to my thoughts after writing the post after yours, I will be adding a cleaning additive far more often.

The last thing I want to do is ruin a big ride by having crud in the gasoline affect the performance of the engine.

I will continue to add a tiny amount of RXP with nearly every gas tank fill.

I will now carry a bottle of Amsoil injector cleaner, or locally source Techron, and add it every couple tank fills.

Since I often buy a half tank of gas, and don't want to overdose the additives, these additive additions will be adjusted accordingly.
 
#6 ·
Thanks to a comment by cbdane, I have opened the BMW booklet provided to each of the pre-order purchasers. There is says: "Thanks to the flat design of the combustion chamber, the base of the pistons and the valve reliefs have been kept flat despite the high compression ratio of 12.2:1. The engine is designed for super unleaded petrol 95 ROZ. Knock-control has not been used, due to the efficiency of the combustion chamber."

OK, my thoughts are that the small cylinder size, 267cc, allows for good combustion because of the small distance to the edge of the cylinder from the single sparkplug. That being the case, common sense tells me that if there are carbon deposits on the top of the piston, or cylinder head, combustion could be commenced before the sparkplug fires. Pre-detonation or pinging. The engine management system has no way to compensate.

The booklet says these things about the fuel system: "The fuel supply has no return but thanks to variable pressure regulation, only supplies the required amount of fuel to the injector valves."

OK, we have 6 tiny fuel injectors with one way connection to the fuel pump. This means that any crud which passes the fuel pump screen heads to an injector without any escape but through the injector. In a big injector, like the ones used in the R1200 engine, the opening allows the passage of crud much easier. Do you see the potential for a problem here?

I think that these are two very important reasons to include a fuel additive routinely.
 
#9 ·
Top Tier Gas ( Top Tier Gasoline ) is a good start. As is Costco and their stations offering 5X EPA minimum detergent.

However, my concern isn't what has been delivered to the gas station, but the storage tank and the added ethanol.

1) Storage tanks can accumulate crud. While not an issue in Dallas where I buy from the same stations all the time without issue. My concern is while on long rides into rural areas where the volume of gasoline sales are a tiny fraction of those here in the 4th largest metro area.

2) Ethanol is now a fact of life in the US. Ethanol burns dirty in engines designed for gasoline. (Yes, ethanol laced gasoline pollutes much more than gasoline without ethanol.)

Carbon is a natural byproduct of the combustion process. This carbon makes deposits on the piston and cylinder head which can heat and pre-ignite the gasoline ahead of the sparkplug.

So, yes I buy better quality gasoline where and when I can. I still add additives to be certain that I am effectively dealing with both crud and carbon.
 
#10 ·
Just did some 4th grade math on the cost of Amsoil and Techron.

Source: Amsoil Warehouse Pick-Up Preferred Customer Price and Walmart Online 6 bottle price for Techron. Your pricing may be different.

Amsoil: $0.4375/gallon treated plus sales tax. Single bottle purchase. 1 12 oz. bottle treats 20 gallons. Preferred price: $8.75

Techron: $0.511/gallon treated plus sales tax. - 20 oz. bottle 6 pack.(Treatment is 1 oz. per gallon.) Sam's Club says they offer 4 packs of Techron.

My RXP price is very low because I buy it by the case of quarts at a time. :D 1 oz. treats 10 gallons.

The online case of 2.5 oz. bottle price is $143.76 with free shipping. This is: $0.2396/gallon treated.
 
#11 ·
RL,

Thanks for the response. I'm going to use Techron since it will greater availability. Have you tried Redline R-1? Again, thanks for the info. You're a wealth of very useful info. You should have your own section on this website. Do you use a special bottle (clear) or just guess at the amount you are adding to the tank? I guess it would take about 3-4 tankfuls to run injectors clean (or as clean as they will get)?
 
#12 ·
Oh Boy, we are getting into my little bottle fetish here.

I go to the Container Store for their little clear bottles all the time. While they only last a couple years before the fuel additives ruin them, they are perfect for measuring out the small amounts needed.

Here are the details: http://www.k1600forum.com/forum/bmw...l-additives-rxp-combating-ethanol-carbon.html

Be careful though because the solvents in the fuel treatment eat most plastics, as does RXP. Keep each bottle upright.






Here is another post on the topic: http://www.k1600forum.com/forum/14478-post1.html
 
#14 ·
Ok, so you use a funnel for filling? Now the inside of the filler neck looks plastic (orange area), so a long neck funnel is the best option. I hope I'm not being too anal about this. I'm going to start using this additive on my ride home today. I have a just about a full tank of shell.
 
#17 ·
I suspect that if there were issues with the diluted product we would see claims against Chevron since their product is in their gasoline.

In a more concentrated form the very strong solvents in the fuel additives are probably fine. It seems that only ethanol ruins everything it touches from steel to gaskets and o-rings. This is why ethanol can't be sent by the nations pipelines, only rail and stainless steel truck tanks.

RXP is some secret ingredient in a kerosene carrier. No solvents at all. In fact back when the inventor was still alive he sent me a bottle of a biodegradable version, some plant based carrier. So, it is completely safe to use all the time.
 
#18 ·
I've read a lot about these products since your post. I went with the techron and added it to my fuel tank. There is an app for smartphones that locate Chevron/Texaco Gas Stations based on your location. I bought a case of Techron, auto zone gives the military 10 percent of. So I have enough of this stuff to last for the rest of the season. I bought the bottles from the container store as well. This should save big $$ in injector cleaning down the road. I'm also going to use this in my other vehicles as well.
 
#22 ·
RL, you say you use Amsoil and RXP as you fuel additives. Do you mean both at the same time? Or either at any time? Or Amsoil in certain situations and RXP for others?
RXP most every fill because it is easy adding such a small amount.

The Amsoil fuel injector cleaner every once in a while to make sure the gas tank, fuel system and injectors stay clean. Now that ethanol is pretty much everywhere I will be taking the injector cleaner with me on trips and adding it every three fills or so to be safer. If I use injector cleaner I don't add RXP.

At home in the garage I add the Quickshot because it is the award winning high power way to make sure the ethanol laced gas doesn't cause any problems. Only in the garage because the Quickshot is expensive.

Buying RXP like I do, the cost per gallon treated is very small. So, that's why I add it all the time. I add it to my car too since it is an engine that requires premium and I only buy regular. The RXP eliminates all pinging.
 
#23 ·
I've been searching RXP today to see if I can find the active ingredient without any certain answer.

Here are the theories:

What is RXP Gas Kicker? seen here: 99% Methyl Acetate, commonly known as lock de-icer, and non-acetone nail polish remover. As a De-Icer 8 ounces of generic sells for 49 cents, where as a nail-polish remover, 8 ounces at walmart was 88 cents.

******************************************

Clinging To A Quest (RxP gas additive now has some valid testing behind it)
Tampa Tribune ^ | 9/14/05 | STEVEN ISBITTS
Posted on Wed Sep 14 2005 11:21:59 GMT-0500 (CDT) by ChildOfThe60s

The state transportation department's use of RxP, which ended in June, was arranged with help from King.

Howard Jemison, a state support services manager, said the six high-mileage vehicles that used the additive were driven and maintained regularly prior to the study.

Here's how RxP was used:

• The vehicles first were tracked for weeks -- four to 12 tanks of gas -- to determine their average miles per gallon.

• Next, up to 2.5 ounces of RxP were added to their gas tanks at every other refueling.

• For nine months, mileage and gas consumption were recorded for more than 75,000 miles combined.

Multiple drivers used each vehicle, and Johnson provided the RxP free to the state.

During the months that RxP was added at every other gas fill-up, the study showed two 1988 Ford Escort wagons had their average gas mileage improve 16.6 and 33.17 percent, respectively.

Average gas mileage also improved 4.1 percent in a 2001 Ford Taurus wagon, and 6.9 percent and 11.4 percent in two 1999 Taurus wagons. A 2000 Chevy Astro van saw its average jump 20 percent, from 15.3 mpg to 18.4 mpg.

Before-and-after testing done by a firm hired by Johnson showed the vehicles had nearly eliminated emissions of nitrogen oxides, a major cause of smog, according to the EPA.

******************************************

I used it once several years ago when it first came out. I had a 1979 Trans Am with a 400 CI engine. I pulled one spark plug out and using a flashlight, I saw a lot of carbon build up on top of the piston. I put one bottle of RXP in and ran it through (1 tank) and then removed the same plug. Needless to say I was shocked to see how much cleaner the top of the piston was after one dose. A local pep boys had it on sale a few weeks ago for $4.50 a bottle and I bought 8 bottles. IMO, it is good stuff and it works as they say it does.

*******************************************

Ingredients: RxP Blend In Soy Methyl Ester
Soy methyl ester is produced by the transesterification of soybean oil with methanol and using sodium or potassium.
 
#24 ·
New Info from Amsoil

Amsoil Technical Support was extremely helpful in their recommendations for the K1600. Let me share the conclusions with you:
(It appears that you must be a member to access this support.)

1) Don't use auto fuel injector cleaner very often because the solvents are hard on the fuel system, and because we tend to overdose the amount which is certainly harmful. Never more than once every 4,000 miles. Overuse will hurt the catalytic converter and oxygen sensor.

2) Use motorcycle specific fuel additives because they are specifically formulated to be safe for all our hoses, plastic gas tanks, o-rings, etc...

3) After the first use at the dilution recommended on the bottle, go to a 50% dilution thereafter.

4) The Motorcycle Octane Boost and Quickshot are the two products they say to regularly use. The Octane boos has good detergents for cleaning and the Quickshot really helps with ethanol. She added that the Quickshot will protect our motorcycles with ethanol blends up to 15% (E-15).

I sure am glad I made this call. Extremely helpful. It was apparent that she had access to a lot of detailed information which isn't public.

Two other points:

A) No plans to make an EAO synthetic oil filter for our BMW.

B) Use of the 20-50 will protect at high temperatures better than the 10-40, but their testing says that they recommend their 10-40 motorcycle oil for our water cooled engine. (I will use a blend of 10-40 and 20-50 with my next oil change. For this hot part of the country 3 quarts of the 10-40 to 2 quarts of the 20-50.)

I'm sorry about all previous confusion, but there you have it.

Here are the products Amsoil recommends for motorcycles:

AMSOIL Motorcycle Octane Boost (MOB)

Treat Rate
One 4-oz. bottle of AMSOIL Motorcycle Octane Boost treats four to six gallons of gasoline. Slight overtreatment causes no issues,
APPLICATIONS
Motorcycle Octane Boost is primarily recommended for use in four-stroke air- or liquid-cooled motorcycles manufactured by Harley-Davidson®, Yamaha®, Honda®, Ducati®, BMW®, Triumph® and all other four-stroke motorcycles. It may be used in off-road applications, including ATVs, UTVs and snowmobiles, as an alternative to AMSOIL DOMINATOR® Octane Boost. Note: Clean spills immediately using a clean towel. If left standing, Motorcycle Octane Boost can stain painted or metal surfaces. If cleaned immediately, there is no need for concern.


AMSOIL - Quickshot®

Applications
Quickshot is recommended for use in all two- and four-stroke gasoline-powered engines, including motorcycles, ******( However, AMSOIL P.i. Performance Improver is the superior choice for passenger vehicle applications.)​
Recommendations
Quickshot is designed for an initial clean-up dose of 8 oz. per 6 gallons of gasoline, followed by 8 oz. per 12 gallons thereafter.

(To get a 25% discount off retail, become a Preferred Customer.)
 
#25 ·
My plans for usage are:

1) Alternate the use of Quickshot and Octane Boost. If there is only regular gas at a station, add one bottle of the Octane Boost. When I buy less than 6 gallons, wait until the next gas purchase to add an additive.

2) Add RXP every 2nd or 3rd gas purchase. Pre-ignition (pinging) is a big concern to me because of the damage it causes to any gasoline engine.
 
#27 ·
Thanks for the clarification. So is the amsoil MOB replacing the RXP?
No, the RXP is safe for use everywhere, I will use it in all my vehicles and small engines, in addition to anything else I may add. If you had seen the way it changed the R1100GS I owned, you would use it too. Especially since my volume purchase has a per gallon of treatment cost down to about $0.12.
 
#28 ·
How often do you use RXP?


Sent from my iPhone using MO Free
 
#32 ·
I now have access to 89 octane ethanol free gas on a regular basis. There's a 87 89 91 octane ethanol free station less than a mile away. With a steady diet of 89 octane ethanol free gas, are any additives still necessary? If so, which do you recommend?
 
#34 ·
Just an FYI - Costco has a 6 pack case for $20. all the time which works out to about $3.30 per bottle.
 
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