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I have 322k on my 325i running simply Castrol GTX dino oil. I do use synthetic in some of my cars that had it since new, but I do not switch to synthetic with used cars that have high mileage on dino oil.
I run Amsoil 100-1 two stroke oil in all my pre-mix engines and have over 300 hours on my ultralight engine running it at 6000 rpm nearly 100% of that time. I trust Amsoil but do not really think it is necessarily any better than other brand name quality synthetics.
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne
0% Liberal
Men do not quit playing because they get old.... They get old because they quit playing.
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