10-01-2010, 08:45 AM
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CC Member
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Join Date: Jun 2005
Cobra Make, Engine:
Posts: 3,077
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If the oil pump is a positive displacement pump then flowrate at the discharge of the pump is always the same for a given rpm up to its releif valve setting. Once the relief valve lifts it is recirculating back to the pan.
I guess I see the advantage of heavier oil is the boundry layer between the piston skirts and cylinder walls, bearings surfaces etc are thicker ensuring no metal to metal contact. This assumes the component gets oil to begin with.
It would appear if you like heavier oil Mobil 1 15W50 may be the answer since it has the 1200 and 1300 ppm of phosphorous and zinc.
Thanks for all the replies.
Quote:
Originally Posted by Bob In Ct
It's too bad we only have oil pressure gauges. If we had an oil flow gauge many of us would be using a less viscous oil. What good is 80 PSI if it's not moving?
Bob
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