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The EPA says the added fuel economy will save the typical Hurricane Twin-Turbo 510 owner about $600 per year, over the HEMI, based on a 15,000-mile yearly average. Now, keep in mind, that checking the option box for the Hurricane Twin-Turbo 510 will set you back an additional $2,000. Both engines require Premium 91 octane fuel, so using today’s numbers the EPA says you will spend $4,350 annually on fuel for the Hurricane. The Hurricane Twin-Turbo 510 delivers 510 horsepower (thus explains the name) and 500 lb.-ft. of torque, a significant upgrade over the 471 horsepower and 455 lb.-ft. of torque rating of the standard 6.4-liter HEMI V8. Despite the added power, the Hurricane’s additional fuel economy won’t really impress the masses .'
https://moparinsiders.com/epa-releases-fuel-economy-ratings-for-hurricane-twin-turbo-grand-wagoneerEPA rates these engines at 17 combined mileage on 91 octane in the Grand Wagoneer.
15,000 miles @ 17 MPG takes just over 882 gallons of gas.
87 octane gas here is $3.29, so 882 gallons would cost $2,901.78.
91 octane gas here is $3.79, so 882 gallons would cost $3,342.78.
The EPA says that the better economy will save driver's $600 a year, but don't mention that the 91 octane requirement will cost an additional $441 year.
So,
these engines make a little better power than the V-8s that they replace, are rated to get a couple of MPG better (although typical end user reports don't often reflect that),
require 91 octane, cost $2,000 more, and (particularly the HO) are much more complicated and expensive to work on.
Someone tell me what I am missing here. Where is the benefit to the buyer?