I don't use motor oil additives but was wondering if polymer esters are becoming more common as part of the anti-friction and anti-wear mix in some motor oils, particularly in mid and low SAPS oils. Reading about PE's in general and the following Ketjenlube 135 was interesting, it almost looks like the perfect bottle fill for Uncle Joe's Miracle Anti-friction oil additive;
http://www.surface.akzonobel.com/pds/external/1806.pdf
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http://www.surface.akzonobel.com/pds/external/1806.pdf
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