I have a Lincoln Blackwood with a 5.4 engine. It does everything so well, except it will not pass a gas station. Is there anything I can do to improve mileage? I am only getting 14-15 mpg with it. Thanks

 

The following will increase mileage, but have have different after affects.

1. A Warm Air Intake lowers fuel consumption, but reduces your HP/Torque output.
2. 80,000 milewarrented All Season Radial Tires have a lower rolling resistance, but less traction. Running the tires at the tire MFG MAX PSI will decrease rolling resistance even more, but traction sufferes more.
3. AMSOIL in engine, tranny, rear-end, P/S pump will net you about 5-10% increase in mileage. It's also cheap insurance for the components.
4. Water injection up to a point before you have to use EFI's on the O2 sensors to use even more water. Passive water injection is the easiest, Active water injection is more complicated but the best way. Water injection will keep the cylinder area clean and free of carbon deposits. It will also remove existing deposits. Water injection will also keep your oil cleaner longer and you'll have less combustion by-products entering the crankcase.