Can i get your opinion

jdub

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
SM Expert
Feb 10, 2006
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Valley of the Sun
Royal Purple XPR Racing oils are not suitable for a street car. It does not have the additives necessary to keep the oil viable for street conditions. Just because something says "race" in it's label does not make it good ;)

Suggest you research this section and come up with a different oil.
 
airhead04

airhead04

New Member
Aug 21, 2009
1,489
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Lima, Ohio, United States
jdub;1418075 said:
Royal Purple XPR Racing oils are not suitable for a street car. It does not have the additives necessary to keep the oil viable for street conditions. Just because something says "race" in it's label does not make it good ;)

Suggest you research this section and come up with a different oil.
Click to expand...

Im going with 5w30 for right now. Mobil1 5w30. Not the best, but not the worst.
 
deabionni

deabionni

The Lurker
Sep 16, 2007
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Kalkaska, MI
For the money you're spending for the (Group III) Mobile 1, you'd be better off getting Pennzoil Platinum if you're gonna run a Group III based synthetic.
 
R

RiyadYar

Supramania Contributor
Nov 20, 2007
384
0
16
NY
i recommend you read jdubs oil 101 class in his signature its very informative
 
jdub

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
SM Expert
Feb 10, 2006
10,730
1
38
Valley of the Sun
Poodles;1419429 said:
jdub: thought you might be interested in this about RP: http://www.bobistheoilguy.com/forum...n=113354&Words=purple&Search=true#Post1568288

Seems to break down to a lower weight quickly...
Click to expand...


RP is notorious for doing that. From that analysis, it does look like the additive pack has improved though...I see RP is still using a stout amount of ZDDP (zinc) in their formulation. Helps explain the low wear numbers even though the oil sheared down to 20W viscosity.
 
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