V.P. C-11 vs. C-12

[Mike Croley]

Originally Posted by J.R. Haddad

We've got a 1992 Camaro J/SA car, 350 TPI. We run C-11 now, and
are happy with it. All I can get for this weekend is C-12. What should
we expect, and what should we watch for. Thanks, J.R.

Renegade has a fuel called Pro Crate 108 that will work very well.

[Ed Wright]

Originally Posted by Mike Croley

Renegade has a fuel called Pro Crate 108 that will work very well.

Mike, I just printed NHRA's approved fuel list, looking for something else. I don't see that one listed. Lowest Renegade shown is "110+".

[Mike Croley]

Renegade offers a lineup of race fuels for virtually every application, but they didn't submit all of their fuels to NHRA to be added to the accepted list. So for now, the Pro Crate 108 can only be used where the accepted fuels list doesn't apply. But Renegade may look at adding more of their fuels to the list.

[Jim Wahl]

Originally Posted by Mike Croley

Renegade offers a lineup of race fuels for virtually every application, but they didn't submit all of their fuels to NHRA to be added to the accepted list. So for now, the Pro Crate 108 can only be used where the accepted fuels list doesn't apply. But Renegade may look at adding more of their fuels to the list.

Mike, I might suggest you get Renegade to do just that! Now might be the time for them to jump right in there! I use C11 and am happy with the numbers it produces but it is very expensive. I used C12 for many years in another car but never knew from one race to another if it would pass. Jim

.

[Mike Croley]

NHRA may not want to add any more fuel blends to the list, but we'll see.
I'll give you some info on fuel specs.
Sunoco 110 motor octane is 106
VP 110 motor octane is 107
VP C-12 motor octane is 108
The Renegade Pro 110 motor octane is over 108

[Andrew Hill]

Originally Posted by Mike Croley

NHRA may not want to add any more fuel blends to the list, but we'll see.
I'll give you some info on fuel specs.
Sunoco 110 motor octane is 106
VP 110 motor octane is 107
VP C-12 motor octane is 108
The Renegade Pro 110 motor octane is over 108

Mike, could you give us a little info on how motor octane vs research octane differ? Is motor octane what's important to us?

[Mike Croley]

The designation of "110" race fuel is derived exactly the same way the "87" octane designation at your local gas station pump is. And they both mean the same thing, so you have something to compare race fuel and pump gas.
Both race fuel and pump gas are tested in two ways. One test is called the Research Octane. The results of the research octane test are more pertinent to low compression, low rpm engines. The other test is the Motor Octane test. It relates much more to racing engines, higher compression and high rpm.
Each fuel goes through both tests, then the results are added together to get the R+M/2 number that you see posted on gas pumps and on the specs for race gas.The higher the Motor Octane number, the more race gas you're getting for your money. For instance, the Renegade Pro 110 is listed as R+M/2 of 110.5. The Motor Octane is 108,and the Reserch Octane is 113. Added together and then divided by 2 gives you 110.5 octane.