i have a daunting fear that i am actually getting worse mileage some how on off-road? This darn truck is starting to make me mad. Its a love hate relationship. I think that i am going to have to break down and buy some new injectors i guess. With new injectors i should expect to see my mileage increase by 3mpg or so i would hope?
you're probably getting worse mileage for a number of reasons...
1. Cold temperatures require more fuel to make the engine go.
2. Cold temperatures create more drag on an engine.
3. I bet you're warming it for a period of time, rather than in the summer, just hopping in it and heading down the driveway.
4. Most diesel fuel is "winter blended" so it lights a little easier, but at the same time, has less energy
5. Off-road fuel has different properties (cetane, anti-microboal, etc) than highway diesel
6. WVO, WMO, SVO, etc are not "fuels"
BTU values are not consistent, controlled, nor controll
ABLE; neither are cetane ratings, etc.
Hell, you could burn candle wax in one of these things if you could get it to the right temperature. Coal dust was the original fuel Rudolph Deisel used..
Replacing the injectors may result in a slight mileage increase, but I would caution you to NOT replace them for the sole reason of increasing fuel economy.
You're best bet on that one is to reduce how much drag is exerted on and by your truck.
And slow the f*** down.
5% reduction in speed = 3% increase in fuel economy.