QUOTE(dflesburg @ Jun 26 2007, 03:55 AM)
There is a question,
What oil did the 3.2 use in 1986?
My 3.2 had a SHELL Oil sticker on the heater riser.
Who cares what the factory used?
Try one of these:
Castrol 20w50
Royal Purple
Brad Penn
There are a slew of good oils out there. There was a thread about this not too long ago. I believe Len Hoffman (LN Engineering) did some research about this a while back.
LN EngineeringI think the main point is to use a quality oil, keep it cool, and keep it clean.
I use Castrol 20w50 because it is less expensive, and is available nearly everywhere. Our 15 years of 2 drivers at DE events in our 3.2 tells me that the stuff does indeed work well. I'm sure the others are good as well, but I have no first hand experience.
BTW, our oil rarely gets above 210 even on a 100+ degree day after an hour (2 back to back 30 minute sessions) on the track. The front oil cooler works well.