Got a 96 4x4 f-350 that is gettn terrible gas millage..never have changed injectors 185k..not sure what to use.bought truck with 80k and already had blue colored injectors in it..I see there are several different kinds with different LB/HR. What works best and what was original?

 

What kind of mileage are you getting? What method are you using to calculate it? What size tires are stock and what size are on it now? Have you checked the speedometer to see if it's accurate?

 

edit: thought andym was writing the post

 

edit: thought andym was writing the post