Well, imagine how much spend on fuel in a year with the hemi and cut it in half...that is the direct savings. So I spend 3k in fuel with a hemi that means in two year I spend 6k so by end of second year I have paid for the motor in fuel savings. True, maintenance is more, but honestly it is negligible. By year 3 or 4 you've made you're money back and then some. Diesel costs about 10% more but is 40% more efficient than a hemi. Seems a no brainer.
That math doesn't add-up. To say that you spend half as much in fuel for the ED infers that the ED gets twice the mileage of the HEMI which it doesn't. The initial cost of the ED over the non-Etorque HEMI is $3200 ($4995 for ED on Limited and $1795 for non-eTorque HEMI) and $3000 ($4995 for ED on Limited and $1995 for eTorque HEMI) over the eTorque HEMI. Assuming you get 20% off the price of your truck (not a given as we've seen), the ED will cost you $2560 over the non-eTorque and $2400 over the eTorque. Then you have to add sales tax (6.25% here in TX for auto purchases) so that ED cost you $2720 over the non-eTorque and $2550 over the eTorque. I will assume the buyer pays cash in this example (otherwise you have interest on top of that over the life of the loan). Example below.
Assumptions:
17mpg for non-eTorque (Monroney sticker combined)
19mpg for e-Torque (Monroney sticker combined)
24mpg for ED (Monroney sticker combined)
20,000 miles/yr
$2.19/gal for 87 octane
$2.44/gal for Diesel
$2.79/gal for DEF
7504 miles per tank of DEF
20% off purchase price of truck/options
6.25% vehicle sales tax
Regular oil change for HEMI = $40 (10 over 5 years at one per 10K = $400)
ED oil change including fuel filter = $100 (10 over 5 years at one per 10K = $1000)
100,000 miles driven in 5yrs
non-Etorque total fuel cost = (100,000miles/17mpg)*$2.19/gal = $12,882.35
eTorque total fuel cost = (100,000miles/19mpg)*$2.19/gal = $11,526.32
ED total fuel cost = (100,000miles/24mpg)*$2.44/gal = $10,166.67
DEF = (100,000miles/7504miles per tank) = 13.33 tanks of DEF
8 gallons DEF * $2.79/gal of DEF =$22.32 per tank of DEF
13.33 tanks of DEF * $22.32 per tank of DEF = $297.53 for DEF over 100,000 miles (5yrs at 20k/yr)
After 5 years at 20k/yr:
Total ED Cost (not including initial purchase price) = ED fuel cost ($10,166.67) + ED DEF ($297.53) + ED MX above HEMI ($600) = $11,064.2
Total non-eTorque Cost = $12,882.35
Total eTorque Cost = $11,526.32
ED vs. non-eTorque = $11,064.2 (total ED cost from above) + $2,720 (initial cost) = $13,784.2 for ED vs. $12,882.35 non-eTorque (savings of $901.85 for HEMI over 5yrs or $15.03 less per month)
ED vs. eTorque = $11,064.2 (total ED cost from above) + $2,550 (initial cost) = $13,614.2 for ED vs. $11,526.32 eTorque (savings of $2,087.88 for HEMI over 5yrs or $34.80 less per month)
The break-even just on gas, initial purchase price and DEF alone (not increased mx) = 112,478 miles @ $2.19/gal of 87 vs. $2.44/gal of diesel
The break-even just on gas, initial purchase price and DEF alone (not increased mx) = 256,070 miles @ $2.19/gal of 87 vs. $2.44/gal of diesel
Gas prices here in TX are even lower ($1.66 for 87 currently and $1.83 for diesel) so the math works out even worse for the diesel. I also used 20k/yr which is more than most people drive so if you drive less, the break even is even longer for ED. At the end of the day, can you eventually break-even for the ED? Sure, but the vast majority of people won't.