Originally posted by RGRAT1618
He said I would have to drive 100,000 miles a year to make up for the extra cost and there is very little horsepower and torque change.
Rob
Well, he's way off base on that comment. You wouldn't have to drive it 100,000 miles per year to make up for the extra cost. You only need to drive it 100,000 miles
total to make up for (and probably exceed) the difference - and we all know that a Cummins is just broken in at 100k. His gasser will be long gone as your Cummins is rolling over 300,000 miles.
I estimate that I get around 2x the mileage of a V-10 (or a 454). If diesel and gas are roughly equal in price (on average), then here are the numbers to show how you come out ahead.
At an average of 20 mpg, you'll use 5,000 gallons of fuel to get to 100,000 miles. Mr. gasser will probably use 10,000 gallons of gas to go that far. At an average of $1. 20 per gallon for each (and that's a low price), the difference is $6,000. The Cummins is less than a $5,000. option. And the higher the fuel/gas prices, the higher the difference. I still get such a kick out of getting 20 mpg in a 7,300 lb truck.
Of course, you know all the other benefits - not the least of which is that diesels are just cool.

Another thing - ask Mr. Gasser how his 454 does on a 95 degree day towing a 6k trailer up a mountain. Any pinging? Any overheating? Hmm... not with the smelly, oily engine. How does it do on the hills? And how's the resale value on a 454?
Chances are this guy can't be convinced no matter what. At least you know you made the right choice. I still shudder to think that at one point I wasn't sure if I should get the Cummins or V-10 in my Ram. After I educated myself on the Cummins, it was such a no-brainer. Oo.