Royal Purple Racing 41 Motor Oil?
Royal Purple Racing 41 Motor Oil??? 
I use Mobil 1 Synthetic 
04-12-2006, 11:10 PM
#4
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Royal Purple Racing 41 does extremely well in the LS1. It is much better than the regular 5w-30 and 10w-30 Royal Purple oils. They tend to shear while Royal Purple Racing 41 has proven to be more shear stable.
04-13-2006, 05:45 AM
#5
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RP 41 is a much better choice than Mobil 1 5w30. As mentioned, it's very shear stable and has proven itself in oil analysis to be a great choice for hard driven LS1s. I wouldn't consider RP's 5w30 or 10w30 though, both of which thin out too quickly.
04-13-2006, 11:19 AM
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Originally Posted by Optimus_Prime
Is this a good oil to use in a stock LS1?
runs to thin No butter feel. Trending Topics
04-14-2006, 10:44 AM
#8
TECH Senior Member
Originally Posted by Z2K_MrJ
No it Is Not.. Read thier WeB Site.. they state the Synthetic Motor oil & Not the Race Oil. For a Regular Car or DD & not the the Race.. As for M1. runs to thin No butter feel.
runs to thin No butter feel.
