Official EPA mileage estimates for 2011 Infiniti M37 & M56

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Infiniti announced the official Environmental Protection Agency (EPA) fuel economy estimates for the 2011 Infiniti M performance luxury sedan. The numbers showing increases of up to four miles/gallon compared to previous 2010 M models. The new M series received the two all-new design engines: a 3.7-liter V6 and 5.6-liter V8. With this configuration, the engines offer more horsepower and torque than the previous smaller engines.

The 2011 Infiniti M horsepower, torque, fuel economy figures, and increases compared to the previous generation models, with the plus sign to indicate the increase in that category. More horsepower and better fuel economy, what more could one ask for?

MY 2011
M37
M37x
M56
M56x
Horsepower (hp)
330 (+27)
330 (+27)
420 (+95)
420 (+95)
Torque (lb-ft)
270 (+8)
270 (+8)
417 (+81)
417 (+81)
City MPG
18 (+1)
17 (+1)
16
16 (+2)
Highway MPG
26 (+1)
24 (+2)
25 (+4)
23 (+3)