A interesting article

Here is a interesting article on the oils we use. In addition to the facts in the article GM has since take EOS off the market & I've heard from NAPA the red STP is also being taken off the market. The off road racing oils have more friction modifiers in them, but very little or no detergents.

What are you all using for oil?

http://www.lnengineering.com/oil.html

Don Meyer

Don...funny you should post this. This was brought up at our Rochester Street Rods club meeting on Monday.

I used Royal Purple synthetic oil for quite some time in my flat tappet SBC. I asked them this question and here is their response. I will continue to use their product. You make your own judgement. I understand that Amsoil has the necessary additives too, but they are expensive.

Pat,

Any of the RP Motor Oils have more than enough anti-wear additives for a flat tappet cam as we have stayed with the API SL Service Classification due to the SM oils requiring a EPA mandated reduction in certain elements used in additives (ZDDP). We at RP do not see any benefits in performance or protection with the SM oils and plan to continue to make SL oils, until we can guarantee the same level of protection performance we set for our oils. RP also has our Synerlec Additive Technology which literally gives our oils 4 times the oil film strength of other oils, both mineral and synthetic.
This link will give you information on this.
http://www.royalpurple.com/rp-perfor...dvantages.html

RP Motor Oil- 5w30, 10w30, 10w40, 15w40, 20w50

MaxCycle- has a more robust anti-wear package or higher level of ZDDP- MC 10w30, MC 10w40, MC 20w50

XPR- Is Royal Purple’s own secret formulation for the best protection and performance we can offer- XPR 5w30, XPR 10w40, XPR 20w50

If you have any questions feel free to contact us.

Have a great day.

Kyle Neal
Technical Sales Representative
1 Royal Purple Lane
Porter, TX 77365
281-354-8600 office
713-705-9556 cell
kyle.neal@royalpurple.com