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Thanks for the info! I'm looking forward to some VOA's on the new 5W-40.

I've switched over to Shell Rotella T Synthetic 5W-40. I'm told it's only a Group 3 that's been hydrocracked, but still hear very good results from people that use it in the same cars we run. Luck had it that I changed oil in all three this weekend (And boy do I now have a lot of used oil to...

Indeed this seems to be the case. Whee.. Thanks for the suggestion. That's probably what I'll end up using. I change out at 5k and I'll just do some UOA's to compare.

I'm starting to get desperate here. I use this stuff in all my vehicles, including an '05 Audi S4. It drinks down 12 quarts per oil change. Up till now I've been getting it in 5 quart jugs at Wal-Mart for $19.88 ... Recently I noticed that the shelves were looking a little bare, but usually...

lol. Yeah. semi-dry sump design, with everything except the alternator driven off a rear facing gear reduction PTO transmission which shares that oil. Crazy stuff. The alternator wasn't enough to be left "normal" driven by a belt-- it's water cooled. The worst part about these oil changes...

I use M1 5W-40 T&S in all my cars, including my '05 Audi S4 avant. It's great stuff, and Wal-Mart has it in 5 quart jugs for $20.83 ... the S4 sucks down _three gallons_ of this elixer every oil change. Later this year I'll have UOA results showing the oil at 10, 15, 20, and 25k with this oil...

Howdy. I just picked up an 05 S4 with one **** of an engine in it. Audi is being rather vague on what kind of oil to put into it as well as when to take the factory fill out. I've got suggestions to use Mobil 1 0W-40 but the bottles of 0W-40 at Wal-Mart were SM rated. I'm told that SM is the...