Oil change when at operating temp or ambient temp? - BMW K1600 Forum : BMW K1600 GT and GTL Forums
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post #1 of 41 Old 07-15-2019, 03:06 PM Thread Starter
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Question Oil change when at operating temp or ambient temp?

Just looking for opinions here.
I don't mind getting oil on my hands but I'm tired of burning them.
So you see where I'm going with this.


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post #2 of 41 Old 07-15-2019, 03:18 PM
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Neither. I let it cool some from operating temp. Not burning, but still warm.

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post #3 of 41 Old 07-15-2019, 03:29 PM
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post #4 of 41 Old 07-15-2019, 03:35 PM
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As stated. What I do is if returning home and bike is at operating temps, I let it sit 30-60 mins depending on the ambient temps before I pull the plug and filter.
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post #5 of 41 Old 07-15-2019, 04:27 PM
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post #6 of 41 Old 07-15-2019, 04:37 PM
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Originally Posted by BMWGuy View Post
Just looking for opinions here.
I don't mind getting oil on my hands but I'm tired of burning them.
So you see where I'm going with this.

I'll run the engine for just a couple of minutes before changing the oil and I guess the only reason I do that is to get the contaminants, if any, off the bottom of the oil pan and into the oil. Even if it flows better when good and hot, it's too hard to handle and splashes around too easily.
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post #7 of 41 Old 07-16-2019, 11:24 AM
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First off, I assume you are wearing gloves. Harborfreight now has 5, 7 and 9 mil gloves. I still have some 5mil ones left, but I'll probably try some 7 or 9 next, which should do an even better job insulating from the hot oil. The 5mil actually does a pretty good job already, but it rips too easily, especially when my hands are drenched in sweat this time of the year.

I prefer to let out the churned up engine oil ASAP, so any entrained contaminants have a better chance of getting flushed out with the used oil. I pretty much open the bottom (outside) drain plug right after warning up the engine. At that point, I'm more leery of the hot exhaust flanking the oil sump. I usually wear thick leather gloves to crack the drain plug loose first, then switch to the nitrile gloves to spin it out, which I can do without much oil getting on my fingers.

At that point, I just let the bottom sump drain out and switch my attention to the oil filter. I probably could do that in 2min if I rush, but I just take my time. Maybe go inside the house to cool off a bit from the hot Houston Summer heat.

By the time I am done snugging up the replacement filter, putting my oil filter wrench away, packaging up the old oil filter in a plastic bag, so on and so forth, the oil - and more importantly, the exhaust pipes - have cooled off substantially. That's when I remove the inner drain plug. The oil is still hot, but not dangerously so. The exhaust pipes are also not hot enough to burn me, if I accidentally bump my hand against it.
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Last edited by Volfy; 07-16-2019 at 11:26 AM.
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post #8 of 41 Old 07-16-2019, 12:53 PM
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ride it, park it, get the bits all ready, drain it
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post #9 of 41 Old 07-16-2019, 04:46 PM
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I have done my share of oil changes on multiple vehicles and aircraft thru the years. Hot right after a long run, overnight cold, as well as after several days sitting. I have pretty much gone to the ways of a hot post ride and waiting an hour to drop both plugs. Change out the filter and let sit for another hour draining. Then measure the exact amount of oil needed and replace. 80% first filling run the bike for 5 minutes and finish the remaining new oil.

Nothing doing but a test to know for sure about just how much contaminants will settle out of circulated oil. I captured my last oil change oil and put it into a couple of containers to check on later.
After 1 day I didn't really see much in the way of sediment. The second container after 1 week was a different story. Cold sludge - an almost molasses type sediment was evident. I really could not pore the sediment out at that point so I know it seemingly wouldn't flow from a cold crankcase either.

In closing, it is MHO that a warm oil change after the bike cools from a long ride suites me. For sure not a change after sitting for a week just before leaving for an extended trip!

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post #10 of 41 Old 07-16-2019, 04:55 PM
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I've changed the oil in all my vehicles cold. In my feeble mind I figure whatever sediment is left in the oil pan will be stirred up in the new oil and filtered out by the new oil filter besides I'll be draining a little more oil because it's had all night to drain down out of the engine. All the crud in the old oil didn't hurt the engine the day before I changed it so a small percentage left after I change it can't hurt either. Your experience and mileage may vary.
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