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Re: Synthetic to Conventional Oil
When I opened up a 1972 Cadillac 472 with 98,000 miles, the cylinders still had cross hatch pattern on them. I don't think breaking it in with synthetics would have made it wear less, or not break in properly!
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2000 Cadillac STS
2005 Cadillac Escalade
2008 Triumph Sprint ST 1050 ABS
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