Quote Originally Posted by TedK View Post
Will either of these Fuels require an STC?

A year or two ago, Swift Fuels was preparing a different blend that required an administrative STC. It galled me to think that I was going to have to pay several hundred dollars for the privledge of buying Swift's fuel.

I get that Swift, and others, have a cost to bring a fuel to market, but they should recoup that cost thru the sale price at the pump.
I wish to correct myself and offer an apology to Swift.

i now have a much better understanding of when one needs to purchase the Swift STC to use 94UL.

Simply put, if your engine airframe combination is authorized for 80/87 or MoGas, you can legally use 94UL without the Swift STC. However, if that is not the case, then your engine/airframe combo has to be evaluated for compatability with 94UL, and if compatible, then the Swift STC documents that compatability and then authorizes your usage of 94UL.

I might quibble with Swift's STC Pricing, from $0 on some combos to $450 on others, but the logic of getting the evaluation and assuring compatability before use seems sound.