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Message: <blockquote data-quote="Bill Ellis" data-source="post: 529794" data-attributes="member: 59929"><p>I felt the same thing when I added acetone to my gas. I did not notice any change when I switched from syn oil back to Motorcraft Blend. Same performance, same mpg so far. What I would like to see is a test with two engines in a long term run equivalent to about 100,00 miles of mixed driving with random time off and run cycles simulating short trip and long trip city and highway conditions. Southwest Research in San Antonio could perform such a test....but....nobody, except those with some vested interest in the results would pay for such a thing. In 39 years of owning and driving, never had an oil related failure of an engine or diff. Have had a tranny go bad when the reverse band broke.</p></blockquote><p></p>