[Mickey]

Originally Posted by polcat

You can google myths all you want to. There are way to many variations in "getting good gas mileage". Different companies use different detergents in their fuel. Some clean better without effecting its core components, some don't. If you go to fuel refineries and see how large their tanks are, were talking millions of gallons per tank, its easy to see how the fuel can start to "break down" by the time it takes to get to your car/truck. The fuel is sampled at the refineries and it could take weeks to get to your corner gas stations. Stations do not require purity tests upon delivery. Basically each delivery can slightly vary in quality. I to have had better results from using Chevron gas. But I wouldn't say that there is bad info on this tread when you have not supported your reasons. Compression in a vehicle has zero to do with your gas mileage. A low compression car still burns the same way a high compression car will. Common sense tells you a larger cylinder will require more air/fuel to compress, but it still has the same effect on every engine.
I don't want to sound like a dick, but I have been doing this for ten years and have personally been to different refineries for such problems that can occur from bad fuel. If we issue bad fuel, people die! We take this seriously.

Again great post.