Swift Fuels UL94 Av Gas

**427yenko** · #1 Yesterday, 05:02 PM

I have been hearing about a relatively new product on the market being sold at airports called UL94. Produced by Swift Fuels, their website states it has a motor octane of 94+ and is "also rated as a super-premium ethanol-free auto-gasoline with a 99 octane (R+M)/2 rating that meets and exceeds the ASTM D4814 autofuel specification."
Does anyone have any experience in using this fuel in their muscle cars requiring higher octane than what is available at most pumps?
It appears as though this fuel would have a research octane of around 104 +/-, which would be perfect for higher compression engines of the late 60's, assuming your heads can handle fuel that does not have lead additives. It certainly seems to be a much cheaper option than 110 leaded at about $10/gallon around here, even when mixed with pump non-oxy. My local airport has it for $5.79/gallon right now.
Any thoughts?

Bob

**sixt9rsx33** · #2 Today, 02:56 PM

Hmm, have never heard of it. I use 100 octane LL AvGas from my airport at around $6 per gallon in my cars, but word of caution. I put this fuel in my survivor 70 W30, ran great initially. However, after a quarter tank of using this fuel must have "cleaned" my fuel system really well and dislodged a lot of crap which made its way into the carb. Took the carb off and it was a mess with so much junk in it. After a quick rebuild runs great now.
I have had great luck mixing 93 pump gas with Klotz octane booster https://www.amazon.com/Klotz-Higher-...08YEHRUK&psc=1