Rudy I would stay away from it. You only need 91 octane for an R/T & SRT models. It could be one of two things. One, it could possibly be E-85 as E-85 is generally cheaper than gas and has normally over 100 octane. Two, could have some lead in it. On a modern car, you should not use anything with lead in it because it will wreak havoc with the catalytic converter.

I don't think there is much of a difference between 91 and 93, I think it boils down to marketing in the belief that more octane equals more hp, which isn't the case. It just helps slow down the combustion. The only benefit I can think of is if you have a classic muscle car or added certain aftermarket performance that needs higher octane, it might make the difference or save the amount of octane boosters you would have to add.

BLK 6050, I hope that you were only using that in a classic car (a car with no catalytic converter) because that could cause a lot of problems with your exhaust system because of the lead content. On top of that, from what I've always been told by my father who is on an airport board, aviation fuel is generally $1 per gallon higher at least than normal gas so I have trouble believing you came out ahead on anything except not having to pay highway taxes which is illegal.