Originally Posted By: Jarlaxle
The oil temp gauge pretty much mirrors the boost gauge: even a short burst of heavy throttle will spike the oil temp. (Though coasting will drop it almost as fast.) Normal driving, it runs 180-230 degrees. A long highway run will have it around 225-250. The end of a dragstrip pass (burnout, stage, build boost against the converter on the line, and a quarter mile at WOT and full boost) will have it at 280-300. I should have been clearer: it does NOT see the extreme oil temps all the time! It doesn't even see them that often...but it DOES see them.
Even after seeeing this car go together (it was her first car, bought as a stock-and thrashed-theft recovery) I am still amazed how something this brutally fast can be so docile in everyday use.
Best I recall (car parked since Haloween weekend), oil pressure is about 30psi hot idle, builds quickly to about 70psi (maybe 2000RPM). Cold, it's 60-65 at idle, tops out at ~80 around 1500RPM and goes no higher. I have no idea of the bearing clearances, not sure she does, either. (Short-block was bought assembled.)
Stupid question: short of something like a nitro motor, is ANYTHING harder on oil than a high-boost, high-output turbo engine?
Okay, so by the sounds of it, you've got more than enough oil pressure and your oil temps while high aren't nearly as bad as I first thought.
You have enough oil pressure that you could even go down one grade and possibly see a decrease in oil temp. I'd say give Red Line 5w-30 (It's really a 40 grade oil) a try and see where your oil pressure ends up. As long as you can still maintain 10+ psi per 1000rpm, you're going to be okay. Cold oil pressure is of no concern as long as it's not too high.
