How is Seafoam different than, let's say, Diesel Kleen from Walmart? They both seem to say the same things - cleans injectors, prevents gelling, etc.
Also, what are some of the factors that may contribute to mpg? Geonc says he gets 17 at 80 mph with 4.10s. I get 15.5 at 70 with 3.73s. I...