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Message: <blockquote data-quote="ScottyDsntKnow" data-source="post: 418480" data-attributes="member: 10454"><p>15w-50 is pretty damn heavy for a stock engine...I'd be scared of twisting the oil shaft or blowing up the stock pump or something... I get about 40psi of oil pressure at 850 rpm with regular 10w-30 dino oil with a standard volume pump. This is on a new block of course. If your motor is burning a little oil then stepping up the weight of the oil is a trick to buy you time before you need to rebuild but if your motor is running fine on what you have in it right now then leave it well enough alone. I know we car guys are known for "fixing" things that aren't broke but don't dick with your oil if the car isn't having issues.</p></blockquote><p></p>