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Re: Synthetic Motor Oil For 1999 Ford Ranger
maybe slightly improve gas mileage by a fraction. may reduce engine wear on start up. and reduce break down for longer life of oil. thus longer you can go between oil changes. does not sludge up supposedly. bad side is some time this sludge prevents oils leaks that have formed from worn gaskets and seals and when sludge is removed by synthetic. leak become bigger. thus the myth that synthetic oil to regular oil changes are a no.no.
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