Around here, 20% higher fuel costs negates the higher mileage of a diesel. Then there is the much higher maintenance cost. Without looking up the specs, you'll need at least a dozen quarts of oil per oil change, a high quality Cummins oil filter and a big air filter. Then there are one ore more fuel filters that will need to be changed every 10-15k miles. If you don't do it yourself, figure $150 or more per oil change depending on how many filters need to be changed out. Bottom line to me is that if you're not using a diesel truck for its towing capabilities, you're probably better off with a gas engine.
