Motor oil for circle track - Racing Forum

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Motor oil for circle track
Friday, January 21, 2022 7:30 PM
I bought a previously raced 2004 Cavalier which ran very well --points leader. In the FAQ Somewhere I saw a stern warning not to use 10-40 etc. oils, 10w30 ONLY. Why not? What would be the problem with a 20w60 racing oil?

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