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Wow, that's a wide variety of viscosities you've tried! Subjectively, how does the engine feel/sound on the SLX 0W-30 compared to the thicker viscosity oils?

Yes I believe Mg helps keep things clean. M1 has about 20 ppm of Mg, whereas GC has 120 ppm; in my experience GC keeps things a little bit cleaner in BMWs. Then again, it could be the esters. BMW's synthetic has only 10 ppm of Mg and it really tends to leave a mess. Now I'm really tempted...

It should fit a '99 Accord V6...

I had a '99 Accord EX V6 with the supposedly troublesome automatic transmission, and found that partial ATF changes smoothed out the shifting a LOT. Had I kept that car, I would have done partial ATF changes at every (or every other) engine oil change (I was using M1 5W-30 & factory oil filters...

No worries, since you've been using M1 before, I'm sure your engine is very clean anyway.

chefwong, the BMW oil filter is engineered to go 15,000 to 17,000 miles. Just look up the UOAs I've posted on a 2000 BMW 528i. After 15,000 miles, the insolubles are at a perfectly acceptable 0.4 (you want it to be Replacing the BMW oil filter before 15,000 miles is a complete waste of money.

I'd stick with what Mercedes has been using, M1 0W-40. It has the relevant MB approvals, ie, MB 229.3 and 229.5. Delvac 1/M1 5W-40 doesn't.

Agree, this is a fine report.

Slightly OT, but what are the advantages of this "hemi" engine that they've been advertising so heavily?

Yes I will, and thanks for the advice on the copper & coolant, everyone...

Hmm! Perhaps it was bulk Pennzoil then? It was a Pennzoil oil filter (in other words, a Fram with yellow paint on it). Not bad, but I think those clowns at Iffy Lube overinflated the tires--the fronts were at 52 psi and the rears were at 40 psi! Recommended is 30 all around, and 44 max...

Also, in the newer bottles, they moved the "Made in Germany" text over to the right-hand side. (These are the bottles that say "Outperforms" on the front)

Nah don't dump it... if you want to, change the oil filter and do a top-off. What kind of engine/car?

My friend's '01 A4 2.8Q also has an oil temperature gauge, and at first I thought it was broken because it sat over to the left for so long. Takes forever to get the oil hot...

It's my friend's car, he's headed out to Iraq in about an hour (he's a 1LT in the U.S. Army) He asked me to change the oil, basically look after it, and drive it a few times a month (his wife doesn't drive stick). I figured I'd run a UOA to be sure nothing was amiss... Hmm, probably time for...

Yeah not bad at all. Almost purely short trip driving... this engine is probably easy on its oil? This is an OHV engine right? Are these less abusive on oil compared to OHC designs?

Love this oil. I have some Delvac 1 that I was intending on using in my turbo car, but I think I'll stick with GC.

High copper afflicts these engines too?

Probably. Canadian girls are awesome!

The best for his BMW? IMO that would be GC. BMW's oil gets too far depleted after a 15,000 mile interval.