i ran royal purple in my ls1 in my rx7 and it did fine i never dyno'ed it with royal purple so i dont know if its true that it gives you more power. I do know that i stopped using it because it cost so dam much..lol thats the only reason why i stopped using it. might get a case for it this year
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2005 dodge magnum daily driver
1988 mazda rx7 LS6 swap
1969 SS work in progress
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