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hey guys i use royal purple (SAE 5W-30) engin oil on my V8, but I found this behind the bottle and on their web site stating that- Royal Purple Motor Oil delivers superior protection and improves performance in four-cycle gasoline and diesel engines. Does that mean that its only for 4 cyclinder cars and not V8's..
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Borla ATAK catback/ K&N CAI/ Diablo Tune for now  |