Quote:
Originally Posted by Excaliber
"........................ TO much oil pressure COULD be a problem how ever. Extra stress on the oil pump drive shaft has been known to twist and break them! Over a certain amount and the oil by-passes the oil filter. If you are running "high pressure" it's certainly important to keep the rpm low to reasonable until it warms up......................... Another reason I don't care for synthetic oil is the long oil change intervals usually recommended. My position has remained unchanged for decades on this subject, in spite of "new studies". People ask what oil I prefer, I tell 'em, use a good quality brand name and STICK WITH IT and change it often.
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if you are going to run a high volume oil pump, then a chrome moly steel oil pump shaft is suggested. I've never seen a quality chrome moly shaft break or twist. Cheap insurance
I don't have a problem using a synthetic oil & changing it often. Especially with a supercharger, as blow by/contamination is increased. Mobil 1 15w-50, a high volume oil pump, & a chrome-moly oil pump shaft, have been a very stable combination for me. 34,000 miles later no leaks, no measurable wear,
@ 75- 105 degrees F. air temp. with a 180 degree thermostat
cold engine:
pressure @ idle: 82 psi
hot engine:
idle (800 rpm) ...... 35 psi
1500 rpm ..............70 psi
2000 rpm ..............72 psi
2500 rpm ..............75 psi
3000 rpm ............. 80 psi
3500 rpm ............. 82 psi
4000 rpm ............ 85 psi
5000 rpm ............ 85 psi
6000 rpm ............ 85 psi
6500 rpm ............ 85 psi
I've used Mobil 1 15w-50 in several FE engines over the years without any leaking issues that others seems to have. just lucky I guess.
Z.
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