First Tow with my 6.4 Hemi

$.40 to .$60 here.
Something else to consider, regardless of price, having a vehicle that uses less fuel gets us that much farther away from importing oil. And buying more FE cars and trucks is making a difference.
Unfortunately there are people out there that see a dip in fuel prices and run out and buy a fuel guzzler that they really don't need. If your one of those then your not helping.

Scott,

Agreed. If people want a gas engine that is understandable. Not everybody is a diesel person. But, to purchase a gas engine today because gas prices have taken a dip and the trend will continue to drop is an unfounded assumption. Tomorrow the prices might go up again. I remember five gallons of gas for a dollar. Since then it has gone up significantly and down a little but overall it has increased steadily. With Europe's gas prices at or over $6.00 a gallon it is unlikely that this dip in prices in America is much more than a short term happening. While it is good when it happens it is doubtful that it is a long term trend toward cheaper fuel nor would I purchase a vehicle thinking that the trend will continue.

Many drive less than 15,000 miles a year with their truck. Assuming 15 mpg for diesel and 10 mpg for gas, the 15,000 miles a year difference between a diesel and a gas engine is about 500 gallons annually. The diesel uses less by about a third. To break even diesel would need to be a third more expensive. Anyplace it is less than a third more expensive, diesel is less expensive from a fuel standpoint. If gas is $2.75 and diesel $3.25 per gallon the $0.50 per gallon delta is less than 20%. In some places registration costs, a new set of tires, and perhaps even insurance costs more than the difference between gas and diesel. In my example the gas engine uses 1500 gallons at $2.75 for a annual cost of $4125 and the diesel uses 1000 gallons at a cost of $3250. The difference is almost $900 less to drive the diesel. In six years the optional cost of the diesel engine over the 6.4 gas engine would be paid just in fuel savings even with diesel being $0.50 more expensive than gas.

Assuming that the diesel only gets 13 mpg, or three better than the gas engine, the cost delta per year still favors the diesel at a cost for gas of $4125 and diesel at $3750 or about $400 a year less. Just looking at the price at the pump certainly does not tell the entire story yet for so many that is all they consider. And the diesel has almost twice the power if equipped with the heavier duty transmission.

And, the more miles a person puts on a truck the better the diesel pencils out as it relates to entry fee costs of the oil burner engine.