Originally Posted By: AzFireGuy79
An easy way to to treat your fuel system with one of the many fuel system cleaners is to look at your expected OCI (3k,5,7.5 etc) when you are approaching your next oci on a full tank, add the fuel system cleaner of your liking and run the tank down to Empty. Then change your oil and life is good. The reason I do this is because many of the fuel system cleaners get into the crankcase and can degrade oil. If you change it after treatment you flush most of it out.
I do the same thing, it takes all the worry out of the equation.