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High speed oil burning 200 1986

At 80mph each one of your pistons fires four times as often as at 20mph. Also, at 80mph the throttle plate is open furthur because you are fighting considerable wind resistance. The increased throttle plate angle increases combustion chamber pressure, thus increasing crankcase pressure, due to some normal blow-by which will occur. Synthetic oil is thinner (even if the viscosity numbers are the same), and this will increase the problem you are having. Every product on the market designed to stop oil burning is as thick as honey or molasses.






--
'89 silver 244DL in Milwaukee WI






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