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Just got back from my local indy who did an oil change. Used 5w30 always and interestingly advises oil changes at 3-4k. Works on BMW and Porsche almost exclusively.
I was in there at 4k and he says oil looked good but thinks that should be the ceiling on intervals. I drive it 100 miles a week and it has never been tracked. He believes engine issues have a lot to do with late oil changes - just something to keep in mind!
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