Current average cost of gas in my area: $3.60. Current mixed rating of RAM 5.7 V8, 14MPG. If you drive 15,000 miles per year you’re spending $3,857. Bump that to 16MPG with e-torque and you’re at $3,375; a savings of $482. So effectively, this $1450 option pays for itself in 3 years. If you keep the truck 5 years you…