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At least one person has reinforced that this is obviously a result of oil starvation, and this seems to be the what makes the most sense to me considering the pictures. Other than that, Mitch is the only person to specifically question what oil temperatures were before speculating GC was too...

Any idea what oil temps your Z32TT buddies are typically seeing at the track? I guess you can't really go wrong with running too thick a oil, but depending on the temps it could just be unnecessary and further elevate oil temps. I wonder if there any documented experiments with thick vs thin...

I wish I knew...I have no aftermarket gauges to monitor these things. I have no idea if pressure went to 0 either, as I wasn't looking at the stock pressure gauge. Perhaps I will be prepared next time. At what temperatures would you be concerned about with the 30weight oil? As far as running...

No UOA unfortunately. It is common for Z32 guys to overfill a bit in hopes of preventing starvation just that extra tiny bit..The only downside I see is perhaps blowing out seals. I can't see how adding only .5quarts of another high quality synthetic would be detrimental or cause such a problem...

I spun rod bearing #1 and damaged #2 badly during a HPDE @ Monticello Motor Club in NY. I drive a 91' 300ZX TT with the stock engine and turbos but with roughly 17lbs of boost on stock turbos, larger injectors, safe ecu tune, K&N style cone intake, cat-back, etc. however with stock intercoolers...