Hangman,

Thanks for the clarification. What you descrbed fits both what I felt and what Kurts was saying....I think.

Additives could likely make the differences, seems logical. I know my milage computations were accurate, 1100 mile trips to New London CT four or five times a year, compared in both directions keeping conditions as similar as possible. Then repeating the same test in the same vehicle to compare data. Shell beat BP everytime.

As to the higher gas prices, most of us are burning a bit becouse we have no choices. It's good for those in the business but hurts the rest. The devalued dollar hasn't helped fuel prices but then manufacturing, where I'm from, is now competing better with offshore sources. I just beat a Chineese company on a contract they killed me on last year. The devalued dollar was the reason. So now I can afford the premium gas for my new toy. And put ten people to work.

This tread has kinda gotten off the subject, "what do you use in your crossfire?" But it has been informative.
Thanks all


roadster with a stick