Quote:
Originally Posted by jean019
Completely disgusting ... personally I change it every 20000 miles, when it starts to become black.
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This was after around 50,000 miles after the last change, which technically was slightly too early (it was not due until the next oil change).
I think there is a case to do it every 2nd oil change, rather than 3rd, but every oil change is probably not strictly necessary, though I can see it's nice to do more often.