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Seal Leak Stopped, Engine Runs Smoother

My car is an 1998 Ford Escort with a 2-liter DOHC Zetec engine. Last year I noticed on the passenger side of the engine an oil leak that caused lots of crud and oily dirt to accumulate on this side of the engine. The oil seemed to get in the belts and a short 20-min […]

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Surprising Results on “Clean” Engine

Scenario is my wife’s ’99 Grand Am, 2.4L 4 cyl, 60k, the subject of my UOA experiments with different filters. Both UOAs were very good. She bought it used with 29k, nothing but Mobil 1 every 5k since 30k. Just for kicks, I ran some ARX at 60k for 1500 miles. Oil still looked kinda […]

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Changing ATF in BMW 740

My sister traveled from Florida over a month ago and stopped to see us on her way up to see our dad and other family in Ohio. She drives a 97 BMW 740iL with a ZF transmission and about 160k miles on the original fluid. She said she had started noticing shifts were not as […]

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