OK, I've watched a BMW mechanic change the oil, relay his experience doing it a number of times, and now doing it myself.
1) There are 2 oil plugs: 1 - 8mm Allen head magnetic drain plug at the bottom of the oil sump. 2 - 5mm Allen head drain plug up inside the sump, accessed thru the drain hole.
2) You need a shallow drain pan. However, when you let the waste oil drop into this shallow pan it will splash everywhere.
Put something in the bottom to diffuse the stream.
3) 5 quarts to refill to the middle of the dip stick. 4 quarts then restart the engine for 30 seconds. Then add the last quart.
4) Changing the oil filter is easy, but messy at the same time. Oil that falls onto the exhaust will burn.
5) Torques: 8mm = 28NM - 5mm = 12NM - Filter = 11NM
* The 5mm plug hits and seats all at once. So, it is easy to over torque this one as there is no give.
* The 8mm plug with new crush washer seats slowly with the give as the washer crushes.
* The 11 NM torque on the oil filter takes some time to get to as the lubricated O-ring crushes a bit. Apply the torque, hold as the ring moves, then apply more until the wrench shows a constant 11 NM.
* Draining the HOT engine oil requires some rubber gloves. There really is no way to avoid a lot of hot oil on your hands and wrist.
* I let the oil drain for hours. That way I reinstalled the plugs and filter on a cool engine.
- My next tool purchase will be a long 5mm Allen socket to reach all the way into the sump.
- The thin blue oil filter wrench fits around the shift lever without moving it. That was a great purchase.
A lot of guys buy spring type torque wrenches which need calibration regularly. I use the inexpensive beam type torque wrenches because they are consistent, year after year. Great for occasional use.
About another quart is drained from the inside 5mm plug. To ignore this one is a big mistake.
Removing and reinstalling the 5mm plug isn't as big a deal as you would think. You just have to be very careful and "feel" your way into the right position without dropping the plug. It was really easier than I expected. Especially considering I do this while laying on an old sleeping bag on the floor. Changing oil this way with the GSA was easy, but the K1600GT is really close to the ground. Easier access may be to place the bike onto the side stand for re-installing the plugs. That way the bike is inclined and there is easier access to the bottom.
I'm working with a fabricator to make a small tool for safely removing the 5mm inside plug. I'll be experimenting with options and taking the dimensions on June 26th. Stay tuned for more info.