Snappy,
How would it change the numbers if you factored in the resale price after you drive each for another 100K miles?
Gas 100k miles at 12 mpg and $3.49 comes to $29083
Diesel 100k miles at 19 mpg and $3.95 comes to $20789
So....
if you buy the v10 and put a motor in it lets say 6500+29083 = 35583
if you buy the diesel for 17000+20789=37789
Then you have to ask yourself do I think that the diesel will sell for $2206 more than the gas truck when they both have an extra 100k miles on them?
PS. I know that my example removes the fact that the diesel will cost more in maintenance I am just throwing out a little different way to look at the numbers.