In a message dated 10/1/2011 3:29:12 A.M. Pacific Daylight Time, toensing at wildblue.net writes: I wonder if the psi difference is due to oil pressure being supplied to the turbo in the Quantum which the Dasher doesn't have? Mostly. A turbo drops the pressure fairly well as do any of the oil squirters that don't seal well. Loren