C11 and C12 in fuel check

Marty Buth · 01-24-2022, 09:13 AM

We have occasionally had problems with C11 passing fuel check. Thinking of switching to C12. Is C12 better for passing fuel check? What are your experiences?

Mike Taylor 3601 · 01-24-2022, 09:43 AM

Marty,
the only problems I have had with C-11 is if I leave in the cell or a plastic fuel jug...
I have kept stored in barrel or VP can for up to 2 years no problem, but fuel left in cell or plastic jug,just one week between races won't pass

jmcarter · 01-24-2022, 09:46 AM

My C12 has never failed (usually buy by the pail and unsealed pails are kept in temperature controlled garage). C11 fails in the past likely linked to conditions referenced by Mike.

Tom Meyer · 01-24-2022, 08:54 PM

There again fuel check is as good as the guy doing the checking no disrespect in anyway, ,those guys are out in the heat just like everybody else. If you fail ask if you can get another sample be polite and ask if its low and by how much. I had a number of the guy from Vp to call if there is a problem. More to come later Tom

SDT1DYI · 01-24-2022, 09:16 PM

Ditto on storing C 11 only in Metal sealed containers. No issues once I switched from Plastic.

Steve Teeter STK/SS 620

Rory McNeil · 01-25-2022, 12:32 AM

Don`t know how much heat, humidity, etc effects the sample, but I have had C12 from a 2 year old drum pass no problem, yet several years ago, I bought 10 gallons of C12 from the VP truck at Seattle, and the following weekend, at fuel check at Sonoma, the guy doing the testing, said that the fuel I had bought one week prior, was borderline. I have to think the drums of fuel taken to the National Events, should be pretty fresh. Go figure.

Mike Pearson · 01-25-2022, 03:52 PM

I have never had C-12 fail fuel check even if it was left in the cell for several months. I did run C-11 for a time but didnt have a good source for it. I also tried Sunoco but always seemed to have difficulties at fuel check with the Sunoco Blue fuel. I didn't see any difference between C-12 and C-11 except in my wallet.

Jim Kaekel · 01-25-2022, 04:27 PM

Marty: We've never had a problem with C-12 in fuel check. We've been purchasing it in 5-gallon cans for several years directly from a VP dealer.

GTX JOHN · 02-01-2022, 03:12 AM

I have bought C11 in a 5 gallon can and have been bounced
a couple times the next week. The C12 - never an issue!

dragracerray · 02-01-2022, 08:53 AM

Quote:

Originally Posted by Marty Buth

We have occasionally had problems with C11 passing fuel check. Thinking of switching to C12. Is C12 better for passing fuel check? What are your experiences?

Marty my brother have had problems with C11. When we fail fuel check we went back to pits and dumped fuel and replaced with fresh C11 only to fail again. Tech guy asked, "did you replace the fuel cell foam".....uh no we didn't. Go back dump the fuel and remove the fuel cell foam and then we passed.
We permanently switched to C12 only to pass fuel check. Since then we have used C12 in pails and C12 from underground tank with no failures.
Ray

01-24-2022, 09:13 AM	#1
Marty Buth Member Join Date: Nov 2002 Location: Freeport, IL Posts: 465 Likes: 642 Liked 232 Times in 39 Posts	C11 and C12 in fuel check We have occasionally had problems with C11 passing fuel check. Thinking of switching to C12. Is C12 better for passing fuel check? What are your experiences? __________________ Marty Buth 3657 STK

01-24-2022, 09:43 AM	#2
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,361 Likes: 333 Liked 279 Times in 96 Posts	Re: C11 and C12 in fuel check Marty, the only problems I have had with C-11 is if I leave in the cell or a plastic fuel jug... I have kept stored in barrel or VP can for up to 2 years no problem, but fuel left in cell or plastic jug,just one week between races won't pass

01-24-2022, 09:46 AM	#3
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,283 Likes: 2,335 Liked 3,118 Times in 961 Posts	Re: C11 and C12 in fuel check My C12 has never failed (usually buy by the pail and unsealed pails are kept in temperature controlled garage). C11 fails in the past likely linked to conditions referenced by Mike. __________________ Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table

01-24-2022, 08:54 PM	#4
Tom Meyer Senior Member Join Date: Aug 2003 Location: Pierce NE Posts: 932 Likes: 73 Liked 351 Times in 120 Posts	Re: C11 and C12 in fuel check There again fuel check is as good as the guy doing the checking no disrespect in anyway, ,those guys are out in the heat just like everybody else. If you fail ask if you can get another sample be polite and ask if its low and by how much. I had a number of the guy from Vp to call if there is a problem. More to come later Tom __________________ Tom Meyer 5240 SS Stock ???

01-24-2022, 09:16 PM	#5
SDT1DYI Member Join Date: Nov 2016 Location: Indianola Washington Posts: 399 Likes: 0 Liked 453 Times in 146 Posts	Re: C11 and C12 in fuel check Ditto on storing C 11 only in Metal sealed containers. No issues once I switched from Plastic. Steve Teeter STK/SS 620

01-25-2022, 12:32 AM	#6
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,300 Likes: 302 Liked 1,074 Times in 294 Posts	Re: C11 and C12 in fuel check Don`t know how much heat, humidity, etc effects the sample, but I have had C12 from a 2 year old drum pass no problem, yet several years ago, I bought 10 gallons of C12 from the VP truck at Seattle, and the following weekend, at fuel check at Sonoma, the guy doing the testing, said that the fuel I had bought one week prior, was borderline. I have to think the drums of fuel taken to the National Events, should be pretty fresh. Go figure. __________________ NHRA 6390 STK M/S 85 Mustang

01-25-2022, 03:52 PM	#7
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,434 Likes: 608 Liked 1,903 Times in 571 Posts	Re: C11 and C12 in fuel check I have never had C-12 fail fuel check even if it was left in the cell for several months. I did run C-11 for a time but didnt have a good source for it. I also tried Sunoco but always seemed to have difficulties at fuel check with the Sunoco Blue fuel. I didn't see any difference between C-12 and C-11 except in my wallet. __________________ Mike Pearson 2485 SS

01-25-2022, 04:27 PM	#8
Jim Kaekel VIP Member Join Date: Jul 2002 Location: Michigan Posts: 1,226 Likes: 133 Liked 529 Times in 107 Posts	Re: C11 and C12 in fuel check Marty: We've never had a problem with C-12 in fuel check. We've been purchasing it in 5-gallon cans for several years directly from a VP dealer. __________________ Jim Kaekel 3836 STK

02-01-2022, 03:12 AM	#9
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,719 Likes: 2,765 Liked 2,425 Times in 687 Posts	Re: C11 and C12 in fuel check I have bought C11 in a 5 gallon can and have been bounced a couple times the next week. The C12 - never an issue! __________________ John Irving 741 Stock 741 Super Stock