Got a mechanical gauge on it today... drove it around for a bit... at FULL hot temp when the gauge on the dash read 0psi it was 5psi on the mechanical gauge. Put in 20w50 and some Lucas and now at hot it doesnt go below 14psi (which is actually in factory spec)... so i'm gonna toss a mechanical gauge in just to keep an eye on it while i'm on the beach and such and just run 20w50 until I start to notice anything funny, or until I get a huge urge to open the motor.