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Originally Posted by 7 skulls
Can't argue with that either. HTHS 3.5 or more for the Castrol I run so I'm happy. Kinimatic viscosity calculations mimic well what i saw with 5w30 and with 0w20. Hated watching oil pressure drop off with the 0w20 at temps matched by the numbers. If I push the 5w30, I should see the same drop off somewhere north of 118C. No race tracks around here unfortunately.
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What did oil pressure drop from/to?
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I determined a while ago that the risks associated with a cooler weren't worth it for my usage and the numbers say I don't need one. Interested in your UOAs and oil pressures. Not being a smart ass. Really glad someone is out there running this car hard without a cooler.
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Yer fine and correct to ask, but I don't have pressure data and haven't done UOAs. If I was worried that I was on the limits either way, I'd monitor, but I'm somewhat relying on UOAs done by others who have tracked without coolers, running similar max oil temperatures to me and haven't seen any unusual or worrying oil degradation or wear metals. For pressure, my understanding is that pressure drop at elevated rpm may be more due to restrictions on the intake side of the pump.
https://www.ft86club.com/forums/showthread.php?t=134863
But same source says that "
A stock engine can take 7,600 RPM all day long..." so I'm sorta counting on that as well...
42 track days and approaching 60k miles, so far so good
And a few of those track days were with 0w20 so
on me for that!