mxmastro Report post Posted January 5, 2010 I was just wondering if anyone uses any sort of fuel injector cleaner in their FFH. I have about 13K miles on mine and I haven't run a fuel injector cleaner because of the warning in the manual (below). I found a similar warning in my Mustang's manual and I am curious if it is just a blanket warning or if damage can actually be caused. "Do not add aftermarket fuel additive products to your fuel tank. It shouldnot be necessary to add any aftermarket products to your fuel tank if youcontinue to use high quality fuel of the recommended octane rating. Theseproducts have not been approved for your engine and could cause damageto the fuel system. Repairs to correct the effects of using an aftermarketproduct in your fuel may not be covered by your warranty." Quote Share this post Link to post Share on other sites