$3.9 for gas, $4.60 for diesel
How much more did you pay for the car comparing same featured gas version?
What does each oil change cost you?
Do you need to drive extra miles to find a diesel station?
Will you still drive the car when it is 300k-400k miles old? That will be over 20 years old in your case.
Diesel engine is good and cheaper than gas version. But just not as good as you think...