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Old 01-31-2022, 10:57 AM   #11
Frank Miller
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Join Date: May 2010
Location: Auburn, MA
Posts: 2,106
Default Re: Oil Change Intervals

VT referenced me doing an analysis and in 2019 I met a gentleman who saw my name tag and walked up to me, shook my hand and thanked me for putting real numbers to the debate.
After 8100 miles my used oil was still deemed usable.
I did another little experiment last year when I ran oil that sat 20 years in a motor I had put together and test run. I put 800 miles on that and sure enough the used oil was still usable.
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