Quote:
Originally Posted by Formula413
Most modern cars easily go at least 5k miles between oil changes with no issues. The 3k mile rule is outdated. I run synthetic in my Civic and go 12k between changes, and lab analysis shows it's still in pretty good shape even then.
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I've been told not to switch a car thats been run on regular oil its whole life to synthetic at high mileage.? Any idea if there is truth to that?