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Originally Posted by clayfoushee
Dave, I previously used Valvoline Racing 20w-50, and my oil pressures were 80 psi and above cold AND at RPMs above 3K warm, and only down to about 50 psi at warm idle. I switched to Rotella 15w-40, and they dropped about 10 psi on each end, which I felt more comfortable with, particularly at cold start-up.
Thanks Rick, it was your previous excellent research on solid flat tappets cams that motivated my change last year. |
Clay, I'm a work in progress! Now I'm researching Brad Penn 20W50. This is the old green
oil that Kendall used to make (they bought the refinery). This is the
oil that so many engine builders used to recommend, including mine.