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Original Message
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RE: 390 Oil Pressure Improvement |
By John - 10/23/2002 5:02:13 PM; IP 142.177.78.190 |
I've gone through this too. STP always works....only for a couple of days. 20W50 should only give you 3 to 5 psi improvement throughout the range. Mind you, getting a difference of 35 psi to 60 psi @ 3000 rpm just by adding STP seems quite incredible, so maybe you'll do OK. |
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