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Considering the time we spend (waste?) discussing oil/ oil change intervals/ UOA/ filters/ magnets /upgraded lifters/ stuck lifters/ engine rebuild costs .........
If the problem is in fact dirt plugging the tiny orifice in a lifter the chance of flushing it out with fresh oil/Marvel snake oil is very low. Take a few jammed/dirty INA lifters apart,you'll see the problem.
If the problem is dirty oil, you will never get all the sediment out from the nooks and crannies in the engine. Rebuild an M96 and you'll understand. So multiple flushes and oil +filter replacements may help but they may also dislodge debris and unless you have a upgraded full flow filter ,the dislodged dirt may flow onto another vital surface.
Which is why we "we spend (waste?) ....discussing oil/ oil change intervals/ UOA/ filters/ magnets /upgraded lifters/ stuck lifters/ engine rebuild costs ........."
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