About a year ago I read about the reduction of zinc dithiophosphate (ZDDP) in the oils supplied with API approval that could affect sliding and high pressure (EP) friction in our cars. (excessive wear on camshafts lifters ertc)
The reasoning for the reduction of zinc, manganese and/or phosphates is that they reduce the effectiveness of and eventually damage catalytic converters and introduce minute amounts of pollutants into our atmosphere.
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2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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