HappyG

What's your average MPH?

G37NC

The G is a thirsty car, no secret there. I've averaged as much as 28mpg on a mostly interstate trip back in Sept. My average reading as of now says 20.8, and that is 99.9% city streets.

G37xs2011

i dont get how are you getting 20.8 driving in the city

Wongster

19.5 with 1/2 my time sitting in traffic in the city and the other 1/2 cruising at 75-80mph on the freeway. As a reference, I had 18.5 with the same commute in my 07 G35 sedan.

sniper27

iTrader: (2)

19.9 about 50/50 city/highway.

G4FSR

20.9 MPG with almost 12K miles, 70 hwy/30 city.

flashk1021

20.2 max most of time 19.7 about 80% freeway and 20% local drive and I have 800 miles on it.

htownboy

It's showing 26 but actually doing the math puts it right at 23.4
6MT gets real good MPG especially since I installed the Stillen stage 3 long tube intakes... Have averaged 27 doing 70-80MPH on long trips out of town etc. since I have the Stage 3 and am using Royal purple oil. That has increased by 2MPG which is really good at those speeds compared to what you guys are reporting in this thread.

The 23.4 is everyday driving average around Houston. I have 35,000 Miles, Use Royal Purple oil and Techron fuel system cleaner every 5000 miles.

P.W.M.B

Dont feel bad..i have a 2010 sedan stock and drive mostly city with 6k on it..11.8!..i guess i have a heavy foot

Chris11LE

I got 25 mpg on a 400 mile trip on my new car yesterday....only had 10 miles on it to start so I varied rpms as best I could and kept it under 4k the whole time. Seems the worse mpg will come when I start to have fun with the car

PascalT

I have 12,000KM and it says around 14.9 L/100km... which is 15.7MPG. 80% city, 20% highway.

In the city I get around 13MPG and on highway about 24MPG.

Coprolite

How did you do the math? Using the main display between the gauges and dividing distance by time?

I noticed that whenever I go to Houston, I get a lot better mileage than up here. It must be the lack of hills.

I am averaging 20.2 with less than 1k miles, I anticipate this increasing with time after break in.

PascalT

Me either. Any secrets? I realize cities are different from one another, but to get 30-40% more MPG than I do in the city how is it possible? I don't floor it all the time and I barely use DS mode.

Coprolite

I noticed that temperature played a big role in my mpg on my short commute. If you do short trips the car spends more time(as a % of total) getting up to full operating temp for all the systems(water/oil/trans/diff). If it is colder, it takes longer. Here's my example: Commute to work: Start car, let it idle while buckling and closing garage. It is currently parked outside, as the Accord is fully detailed, waiting to be sold. This makes it colder upon start. When leaving from a 50 deg garage, the car is usually pretty warm and pumping out heat to get me warm in about half a mile. When it is colder, this time is lengthened. Any time spent driving with the car below normal temp will result in lower mpg. As my whole commute is 12 minutes, just another minute below normal temp has an impact. I have been getting about 17 during this last "cold" snap on my normal commute. At warmer temps, I was getting about 19-20. My average of 20.2 is related to my longer joy rides and fun trips to Dallas. It hit a peak of 27 on the way to Dallas(45-1 hr drive) with a warm car right after fueling.

To make a long story short: short trips = lower mileage, if everything else is the same. I would fully expect city driving in a warmer climate to be more efficient than when it is very cold. Of course, once it gets very hot it may suffer with the A/C on full blast.

Chris11LE

Coprolite is right. Its all about the air/fuel mixture. More (denser) air = more fuel needed. Cold air is more dense than warm air, so the colder the air and engine to start the more fuel is necessary.

If you had a datalogger to hook up and watched it real time, youd see the fuel trim change as the engine goes from cold to warm.

Thats why its hard to pinpoint mpg figures between people and cars. Everyone drives differently, different geographies, weather, etc. Only real way to compare them is if we all do a cross country caravan of Gs. Then we would all be in the exact same conditions at the same time and could compare mpg (driving habits would still affect the numbers somewhat but that would be pretty much the only variable at that point, minus mods)