Generation III Internal Engine 1997-2006 LS1 | LS6
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Has anyone used 5w20 RP in their car?

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Old 06-12-2007, 05:50 PM
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Default Has anyone used 5w20 RP in their car?

As stated in my title. Thank you very much.
Old 06-12-2007, 09:14 PM
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I have, no real noticable difference. Its good oil... I actually prefer the German Castrol, but its hard to find, so I usually stick to 10-40 Castrol Syntec.

BTW, dont use the RP ATF in your trans if you have a MM6. There is a chemical in there that has been known to eat blocker ring material and cause premature blocker ring wear.




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