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just curious, but i noticed you said 15000 mile oil change?
the problem with oils that claim a change interval like that is that usually what makes oil changes neeeded is the filter, not the oil. No matter what the oil bottle says, there arent any filters out there that last 15000 miles. Especially something like frams, that use cardboard endcaps and a cheap pos bypass valve
Just a recommendation, based on info from a NASA driver with a pro license, and a engine engineer from a major auto manufacturer
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