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Will my oil pressure or idle rpm change when I switch to AMSOIL?
They might. AMSOIL is a better friction reducer than conventional oils and friction directly affects oil pressure and idle speed. Less friction in the engine will lead to lower oil pressure and more rpms at idle. Since synthetic oil doesn't have to "push" as hard to overcome friction as conventional oil does, the oil pressure drops. Oil pressure is really "back pressure" and is actually a meaurement of resistance to flow. The engine still has adequate oil circulation, but like the heart of a person whose blood pressure is lowered through medication, the engine doesn't have to work as hard for the end result.
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