So, no boost = better mileage, correct???18 highway empty 12 pulling trailer highway. stock tires and odometer correct. only use power service in winter to help with gelling. Install a boost gauge. it is amazing how much fuel mileage drops as speed goes up. I can run 55-60 empty no trailer and only run about 2-3 psi boost (no head wind) a little faster and 5 psi boost, mileage drops fast.
It did. I guess I misunderstood jeepyr -- I thought he'd found/fashioned something a little taller. I've always thought the stock air dam doesn't go down enough to clear the air around the crossmembers and suspension. Kind of curious to A/B test it.@ jimduchek, didn't your truck come with a lower air deflector? Mine did.