Originally Posted by Jackie McCracken (Post 558468)

AV Gas will not pass NHRA fuel check, there is no spec card because it's not an approved fuel. Approved fuel that checks perfectly out of a freshly unsealed drum will not pass tech if left open to the atmosphere for even a very short period of time, less than an hour for most. If you're running a class that requires fuel check it's best to get it at the track/race and keep it sealed up tight and out of sun light if it's in plastic jugs. If there is any doubt have the fuel check guy test it before you put it in the car. Another tip, if you run a car that requires fuel check DO NOT EVER put unleaded fuel in the tank as it will contaminate the entire system and your "good fuel" will not pass until you've completely flushed the fuel system several times with good fuel.

Jackie McCracken
former NHRA D4 Tech and fuel tester