Originally posted by: Kur
Shell is cleaner, but not sure if it does anything more then help from you fuel filters clogging.
Funny you say that. The WORST tank of gas I've ever gotten was from a Shell station last year in Nebraska. Absolute crap. Bad performance, bad mileage, just BAD gasoline. Not blaming Shell, as it was most likely crap in the tank of the station, but...
Having worked in all the refineries in the S.F. bay area at one time or another, I don't have much loyalty for brands. You'll see gas tankers of all brands lined up waiting to fill from the same set of "taps"...The ONLY difference is brand specific additives, which (I think) are added when the truck is filled. Otherwise, gasoline is gasoline, UNLESS it is a high ethanol/methanol blend, which some brands are.