Just curious if anyone is using it or has starting using it? I have been using Mobil 1 but we are going to try royal purple when I change the oil next weekend. A friend of mine gained a little under 10 rwhp on his camaro when switching to it. I am not exactly sure what oil he had before, but i believe it was castro racing oil. I figured maybe it was worth a try

 

I used to run Royal Purple... The oil always came out the same color that it went in, my oppinion on that is it isn't cleaning the engine. Not sure if they run less detergents or what??? Mobil 1 always came out BLACK even after 1500-2000mi.

Only benefit I saw was a little quieter LS1 piston slap

 

save your money run mobil one

 

I have it for everything trans , rear, etc . I like it.

 

I switched evevrything over to Royal Purple last year when my stang was at Dez Racing

 

It's actually costing me less money since my boyfriend gets it through his work and they no longer run mobil 1

 

I don't think you will gain any HP Steph, but if it's available at a good price, It's probably as good as the Mobil 1 anyway.

 

yea i wasnt expecting that at all. I just wanted to see if anyone knew if it was better or not, cause thats the rumor ive been hearing

 

i think it is what ever your car likes best, mine likes mobil 1, i think pure evil runs royal pruple or atleast he did.

 

DO NOT RUN ROYAL PURPLE IN THE TRANNY!!

As for the engine run a 10w/40 or even better a 0w/40.

 

Hehe no fears, when I couldn't reach you I called keith to varify what to put in the tranny.

 

what advantages would the 0w/40 have over the 10w/40??

 

Sorry to hijack but why? And what do you recommend?

 

Do you folks ever spend the 20 bucks to have your oil analyzed once every few oil changes? Just curious as it is well worth it in my opinion. http://www.blackstone-labs.com/free_test_kit.html

The Royal Purple racing 41 formula does very well in the LS1 but some of the the other RP oils like the 5w-30 DO NOT do very well in the LS1. For that mattter neither does M1 5W-30. The truck and SUV M1 does well in an Ls1 as does the GC 0W-30, Redline 5W-30, Amsoil 5W-30 and RP Racing 41.

If you listen to the resident oil experts here they say the RP 5W-30 and M1 5W-30 are too thin at temperature and are closer to a 20 weight oil according to oil tests done. I'm not the oil expert (that would be Patman) but I have read a lot about oil for the LS1 over the last 3 years and would not use either the RP 5W-30 or the M1 5W-30 in my LS1. This coming from a guy who up until my LS1 used M1 5W-30 in EVERY car I've ever owned and that is probably more than 20 cars.

Just my 2 cents...

 

After talking to Don I ordered 12 quarts of amsoil SAE 10w-40. Stuff was like 78+ shipping, which is only a little more than the mobil 1, so id go with that.

 

I've tested alot of oils and found Mobile 1 0w-40 synthetic has the least amount of oil consumption.That sells it for me

 

After your recommendation I started using it and I havent burned a drop in the forged 346 and you might say I dont baby it. It's the best of all worlds, you geta thin oil for start up and a thicker oil at the top.

 

Good advice Don and Brent, thanks guys

 

If you have the latest issue of Hot Rod, Comp Cams speaks of using Diesel truck oil as one of the best oils to use in performance engines in lieu if cams rounding out and or failing over time. My new motor is breaking in with Rotella SAE 40