quote:
Originally posted by rekced:
When I say drive hard, I mean 95 degree days in the summer with the AC on and redlining every gear with an APR chip.
I've done this kind of driving in the past (GIAC chip) in similar weather, with 0w-30 and 5w-30 synthetic oils. Oil temp remained in the 210-215F range, no matter how hard I pushed it.
quote:
I always figured the oil would sheer down in no time because of all the viscosity improvers.
Yes, the M1 0w-40 shears down a little bit, but it doesn't mean it's unable to do its job anymore. All oils shear or thicken a little during the normal course of their life inside an engine.
quote:
30 weight oil just doesn't sound idea to me with the way I drive,
I just don't get what is with people's fascination with very thick grades when the UOAs we've seen (chipped 1.8Ts as well) show that the thinner oils do the job just fine. At the same time, thinner oils flow quicker on cold startup, which is when most of the engine wear occurs anyway.
quote:
It's kind of a "Yes or No" at this point.
If I had to choose between these two, it would be 0w-40.
[ June 01, 2004, 05:58 AM: Message edited by: Quattro Pete ]