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SO you got your answers on the tankers and they are correct, they have multiple chambers and carry all grades of fuel. You also got excellent advice on using different formulas. If you are using a cheap station, you are NOT getting top fuel. If you really want to screw things up, keep using crap gas.
I have posted, many times, that these cars need top fuel. My personal recommendation is Shell. I can also defend Chevron and Texaco. There are others on the list, but these are the BEST. Some people will tell you that there is no difference in fuels. If this were the case all the NASCAR cars would use different fuel. Each fuel is mixed with different additives. These additives clean the engine and boost performance. The boost if by making the fuel burn more efficiently, reducing power loss. Raw fuel burns very dirty, leaving carbon deposits and thick smoke which oxidizes. The additives clean that smoke and carbon allowing a cleaner, fuller burn. They also clean the intake and exhaust valves and intake manifiold to allow clean delivery of air/fuel mixture. This IS where performance comes from.
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