Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Any Reason to run SAE 30 vs 10W30 ?
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Old 07-14-2009, 03:44 PM
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Is it a flat tappet(lifter) cam in the engine?
AND
Are you using the Valvoline Racing oil straight 30?(I think it says VR-1 on the bottle)

The building may be insisting on this cause that VR-1 has a higher zddp package(wear additives) in it which will help your cam and lifters lifespan

You should always follow the builders recommendations, especially if you have some sort of warranty with the builder
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