Originally Posted by jim48

Tom,

I'll be interested to read what you find out. I've used the Power Service white and grey for 8 years. Seven years in the 6.0 and since Feb in the new 6.7. The only time the 6.0 had a fuel problem was when one injector failed. Unfortunately it caused all the injectors on that bank to act up. Ended up having to replace all four of those injectors. Never had any other issues and traded the truck in Feb for the 6.7.

I did enought testing with PS in the 6.0 to think it more than paid for the price in increased mpg. I did not testing with the 6.7 and either the white bottle or grey has been in every gallon since made.

I am not against changing my fuel additive if there is a better choice. I don't know anything about any of the other brands. I'll be anxious to see what you all have to say about what additive you are using. My thoughts are the PS lubrication ingredient may be helpful for the fuel injection components, but I have no proof.