While we are at it.... What is the difference with these products? Barryman's B12 Chemtool, Motor Treatment (Walmart) gumout Tune-up and SeaFoam..... Price in same order at Walmart.... $3.17, $4.83, $$6.47 and $6.97.
I like SeaFoam and generally use it in my gasoline tank, have not tried it...