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Originally Posted by John Burt
IMHO if a filter cost apx 40% of what you pay for decent oil, change it every time there is nothing like goof lube for ensuring your lump, stys fit.
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True, but then the filter only filters oil, it doesn't condition it in any way. Unless the filter is getting clogged and reducing oil flow a new one
won't improve matters, it won't filter any better.
I don't change filter every time, to do so is a waste, however warm and fuzzy the feeling fitting a new filter might give you. I do empty the filter/filter housing though, that's usually a half a litre or so of old oil that will ever so slightly reduce the performance of the new oil.