Quote:
Originally Posted by NoHaveMSG
Similar. My oil pressure climbs and hits close to 55-60psi and then drops after 5800rpm. He doesn't have data points for 5000rpm, but I would be betting he was seeing similar. My peak pressures are comparable and given more data points it may have been very close.
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I was also seeing this pressure drop at high rpms and temps above 98C with 0w20. 5w30 cleared that right up. Cavitation is a destructive event, gouging micro grooves in the pump surfaces. Never saw any signs in my UOAs. Not saying it doesn't happen just think 0w20 drops viscosity enough where it no longer pumps effectively.