Apparently the EPA mpg is:

2009 G37 RWD sedan, auto: 18/26
2009 G37 AWD sedan: 18/25

I believe that these are class leading mpg figures. And very impressive for a 328 hp, RWD vehicle. Infiniti has come a long way in this department. Their mpg used to be near the bottom of the pack.

Obviously, VVEL and the 7 speed auto are good for mpg. Wonder what direct injection would do.

 

just for comparison

300 hp/300 trq 335i is 17/26 for rwd auto or manual
335xi is 17/25 for auto, 16/25 for manual.

 

I think the IS 350 is around the same with MPG but owners are experiencing better MPG depending on driving style.

I'll reserve final judgement until owners chime in with real world experience, which many times is different than ratings.

 

hmm with DI the 3.7 could have even higher HP and MPG figured. maybe 10%? surprising that without DI, the MPG is pretty much in line with the rest of the class.

 

The VQ has been one of the top V-6s for over a decade now. Nissan continues to evolve it and make it better.

 

Yep.

2009 G37 RWD sedan, auto: 18/26
2009 IS350 RWD sedan, auto: 18/25
2009 335i RWD sedan, auto: 17/26
2009 C350 RWD sedan, atuo: 17/25

 

I'm getting 27 mpg with mixed driving in my 350

 

Too bad it will still be slower than a IS350 or 335i.

 

maybe, but at least it offers a manual tranny and an LSD

 

Maybe, but not necessarily. The new 7 speed auto could make it more spry (it has for the new FX).

 

Same can be said if Lexus ever decides to add the Valvetronic technology to the 3.5L engines.

 

Considering that the 2008 G37 coupe gets 18/24 with the auto and the 2008 G35 sedan gets 17/24, that's some noticable improvement for the sedan. But as 1SICKLEX metioned, let's see what it gets in the real world.

It's still impressive that an engine with that much displacement and power can put out EPA numbers that compare to the older 3.0/3.3 engines from other manufacturers. My old 2006 Accord V6 was only rated at 18/26.

 

Agreed, its amazing how these big V-6s with V-8 performance are getting pretty good economy.

The 7 speed will help Nissan/Infiniti huge b/c with the 5 speed, the cars are churning at a ridiculous 3200 RPM or so at 70 mph. The RPM will drop considerably with the 7 speed when one is cruising on the highway.

 

I am going to wager a bet that the new 7 speed G37 sedan will run the 1/4 in about 13.8.

Remember more gears do not always equal better times. For example, the '07 Vette which introduced the new GM 6 speed auto was actually a tick slower than the previous year's 4 speed auto.

 

what was the EPA estimate on 2007-08 models?

real owners were getting 22mpg or less. it was a gas guzzler