"The truth is that while there is a price premium (roughly $5,300 on average) associated with the initial purchase cost of diesel vehicles, they typically get 30% better gas mileage and flaunt superior torque numbers and reliability ratings. The automotive analysis firm Vincentric estimates that driving a diesel car will save $2,117 in fuel costs over one year assuming annual rate of 15,000 miles."
"But the purchase of something special, like the 2013 Mercedes-Benz GL350 Diesel, is financially justifiable based on the total cost of ownership: the GL350 Diesel costs $8,315 less to own than its GL350 cousin." (I think they mean GL450 cousin)
Read the full article online at Forbes.com