Hi I have a 2007 335i and a 2009 740il, ive been using fuel cleaners like redex and slick 50 but have never really felt a difference, I keep hearing on the forum references to fuel cleaner called Techron and previously use to hear things about seafoam. I would like to know which is the best to use, my cars do drive nice but just feel that they are drinking a little too much fuel. Also if either has been used what was your experiences and did you feel a difference after using the products?
Thanks