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Royal Purple 5w30 vs 5w40?
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05-23-2007, 02:17 PM
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jon@themshop
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I thought RP had a LL rating oil.
Anyways, if you plan on changing your engine oil every 7500 miles then I'd use the RP 5w-30. Just monitor your oil level on the first 3000 miles.
I use ELF Solaris LSX 5w-30 which is LL-04.
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