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Message: <blockquote data-quote="OLD H2S" data-source="post: 1469797" data-attributes="member: 20979">Ding Ding Ding, a winner...All this is moot because we all have different motors with different maintaince  histories.  What is your oil pressure hot at idle and what idle rpm? If I go up 100 rpm my pressure will double.All BMW M series car are fed 10-60 are they built to a loose tolerance? I don't think so. Ford wants 10-50 in the Coyote.  How was your crank bearings set last time rebuild? Did they use 2 different sizes on each crank throw? I don't think so. Some engines I have made close and high pressure and some have been 10 psi at 600 rpm at idle with 40w. with small bleeders on the roller fingers with stock squirters on the chain tensioners running a 13mm Hurricane oil pump, but it will still hits 100 psi on every start upper 5 minuets. The base stocks are not all that different you can only start with the few that are available, the difference comes from the additive package and how much you want to pay for the job it is to do. Do you run racing oil? Why not? It is good but you do not need the antifoaming agents on the street. Is your car stock? Not many on this web site are, are you straight line or running in circles? Dinosaur oil changed every 1000 miles will be better than AMSoil at unlimited mileage and 1 year duration because no matter what you use it still gets dirty and full of acids after a year even if the test results come back clear.My friend flies the number one acrobatic plane in the world, it runs on dyno oil changed every 8 hours and comes without an oil filter to make sure you change it every 8 hours. The engine is rated to 11g's in all directions...thats a crazy built engine.</blockquote>