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Pontiac G6 Gas Mileage

The mid-size Pontiac G6 comes in a dizzying array of configurations, with the most fuel-efficient combination delivering 30 miles per gallon (MPG) on the highway. Pontiac covers all the bases with the 2008 G6: sporty coupe, sleek four-door sedan, and snappy two-door convertible.

The Pontiac G6 Convertible is available with two different V6 engines, each mated to a four-speed electronically controlled automatic transmission:

  • 3.5 liter V6, producing 217 horsepower (HP) and 217 foot pounds of torque. Gas mileage: 17 city / 26 highway.
  • 3.9 liter V6, producing 222 HP and 238 foot pounds of torque. Gas mileage: 15 city / 22 highway.

The Pontiac G6 Coupe is available with two different V6 engines:

  • 3.5 liter V6, producing 219 HP and 219 foot pounds of torque. Gas mileage: 17 city / 26 highway.
  • 3.6 liter V6, producing 252 HP and 251 foot pounds of torque. Gas mileage: 17 city / 26 highway.

The G6 Coupe can be configured with the four- or six-speed electronically controlled automatic (with overdrive). The six-speed is standard on the GXP model. The G6 Convertible is a good bit heavier than the Coupe, with the GT Coupe weighing in at 3415 lbs., the GXP Coupe weighing in at 3487 lbs., and the Convertible tipping the scales at 3855 lbs.

The Pontiac G6 Sedan is available with three different engines and the choice of a four- or six-speed electronically controlled automatic transmission, with overdrive:

  • 2.4 liter four cylinder engine, producing 169 HP and 162 foot pounds of torque. Gas mileage: 22 city / 30 highway.
  • 3.5 liter V6, producing 217 HP and 217 foot pounds of torque. Gas mileage: 17 city / 26 highway.
  • 3.6 liter V6, producing 252 HP and 251 foot pounds of torque. Gas mileage: 17 city / 26 highway.

We recently spent a week test driving a 2009 Pontiac G6 sedan and were impressed with the car’s ride and comfort. We had no problem exceeding the official gas mileage ratings … as long as the G6 was driven with a light foot. Check out our Pontiac G6 review for a pair of tips on how to get the best gas mileage out of the car.




Pontiac G6 Gas Mileage – 2005-2010

Year Manf. Model Engine Disp. Fuel Trans. City Hwy
2010 PONTIAC G6 4 cylinder 2.4 liter R (A4) Auto 22 30
2010 PONTIAC G6 6 cylinder 3.6 liter R (S6) Auto 17 26
2010 PONTIAC G6 6 cylinder 3.6 liter R (S4) Auto 15 22
2010 PONTIAC G6 6 cylinder 3.5 liter R (A4) Auto 18 29
2010 PONTIAC G6 6 cylinder 3.5 liter R (A4) Auto 19 29
2010 PONTIAC G6 4 cylinder 2.4 liter R (S6) Auto 22 33
2010 PONTIAC G6 4 cylinder 2.4 liter R (S6) Auto 22 33
2010 PONTIAC G6 4 cylinder 2.4 liter R (A4) Auto 22 30
2009 PONTIAC G6 4 cylinder 2.4 liter R (S6) Auto 22 33
2009 PONTIAC G6 4 cylinder 2.4 liter R (L4) Auto 22 30
2009 PONTIAC G6 6 cylinder 3.5 liter R (S4) Auto 17 26
2009 PONTIAC G6 6 cylinder 3.5 liter R (L4) Auto 18 29
2009 PONTIAC G6 6 cylinder 3.6 liter R (S6) Auto 17 26
2009 PONTIAC G6 6 cylinder 3.9 liter R (S4) Auto 15 22
2008 PONTIAC G6 6 cylinder 3.9 liter R (S4) Auto 15 22
2008 PONTIAC G6 6 cylinder 3.6 liter R (S6) Auto 17 26
2008 PONTIAC G6 6 cylinder 3.5 liter R (S4) Auto 17 26
2008 PONTIAC G6 6 cylinder 3.5 liter R (L4) Auto 18 29
2008 PONTIAC G6 4 cylinder 2.4 liter R (L4) Auto 22 30
2007 PONTIAC G6 6 cylinder 3.5 liter R (L4) Auto 20 30
2007 PONTIAC G6 6 cylinder 3.5 liter R (S4) Auto 20 28
2007 PONTIAC G6 6 cylinder 3.6 liter R (S6) Auto 20 28
2007 PONTIAC G6 6 cylinder 3.9 liter R (M6) Manual 18 27
2007 PONTIAC G6 6 cylinder 3.9 liter R (S4) Auto 17 24
2007 PONTIAC G6 4 cylinder 2.4 liter R (L4) Auto 23 33
2006 PONTIAC G6 6 cylinder 3.9 liter R (M6) Manual 18 29
2006 PONTIAC G6 6 cylinder 3.5 liter R (S4) Auto 21 29
2006 PONTIAC G6 6 cylinder 3.5 liter R (L4) Auto 22 32
2006 PONTIAC G6 4 cylinder 2.4 liter R (L4) Auto 23 34
2006 PONTIAC G6 6 cylinder 3.9 liter R (S4) Auto 18 26
2006 PONTIAC G6 GT/GTP CONVERTIBLE 6 cylinder 3.5 liter R (S4) Auto 19 27
2006 PONTIAC G6 GT/GTP CONVERTIBLE 6 cylinder 3.9 liter R (S4) Auto 18 26
2005 PONTIAC G6 6 cylinder 3.5 liter R (L4) Auto 22 32
2005 PONTIAC G6 6 cylinder 3.5 liter R (S4) Auto 21 29

Note: the EPA tweaked their testing procedure, starting with the 2008 model year, with the end result being that the 2008 MPG estimates are now lower than previous years. As always, YMMV.

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15 comments ↓

#1 Megan on 07.30.08 at 8:30 am

im not sure if there is something wrong with my 08 g6 4 cyl. but i only get 22 on any drive. my driving which is to work and back is probably about 4 miles city and 35 miles highway in a round trip. i took it to my local dealership and they said there are no reprograms so there is nothing they can do.

#2 mpg-o-editor on 07.30.08 at 8:53 am

@Megan – We haven’t had the chance to review the Pontiac G6 yet … but it’s on our short list for review in the coming months.

You might want to try a change in driving style. This can make a big difference in the amount of gas you use every day. If the G6 has an Instant (or “Real-Time”) MPG display, turn it on and leave it on. By watching the MPG numbers in real-time, you’ll learn how to drive for higher fuel-efficiency.

An Average (or cumulative) MPG display doesn’t provide that instantaneous feedback.

If your G6 does not have an Instant MPG display (I apologize that we haven’t had the chance to review the G6 yet), you can add an after market device to view this information. We’ve used the ScanGaugeII with great results:

http://www.mpgomatic.com/2008/07/07/improving-gas-mileage-with-the-scangaugeii-pt-1/

#3 kay austin on 08.19.08 at 11:43 am

I have the same problem with my car. We took it to the dealer we brought it from, Southaven pontiac in Southaven, Miss. We had a hesitation just one time and an emission from the catalytic converter. They found no problems and no answer for 22 miles on a long trip. I am in no doubt at some time there will be a recall on some part of the car, but by then, will will have wasted all that gas. Kay Austin

#4 jennifer james on 08.29.08 at 3:04 pm

My G6 only gets 22 mile a gallon on the highway…who do we see about the lie????

#5 mpg-o-editor on 08.29.08 at 3:11 pm

@Jennifer – which engine? what are your average highway speeds?

#6 Hugh Daman on 09.21.08 at 9:15 pm

What happened such that the gas mileage was better in the years preceding 2008? One would think they would get better at it as time goes on or perhaps they are getting better at telling the truth?

#7 mpg-o-editor on 10.31.08 at 1:13 am

@Hugh – The EPA dialed down all of the estimates starting with the 2008 model year. I’m not sure that I’d call it telling the truth … more like making excuses for folks with heavy feet. :) I’ve yet to test drive a car that can’t hit the official estimates.

#8 Devyn on 03.18.09 at 11:54 am

You guys need to suck it up.
Stop driving how you drive.
The car uses more fuel when you drive faster.
So to slove this problem, slow down.
Slowing down equals higher MPG.
And I know this and I am only 17.

#9 anthony r. on 07.11.09 at 10:17 am

g6,v6,4 speed auto.
24-27 avg.mpg is easy to get. with 2 people and a trunk full of junk can still do better than 22 avg. doing
45 mph. on back roads and highway can to 31 avg mpg in less than 30 minutes and have a personal best of 34.2 doing between 45 and 65 mph. this car loves doing 45mph when the tach drops 2000. wait till take all the stuff out of the trunk. my wife gets 22-24.

#10 jeff on 09.10.09 at 9:08 am

what is the maximum mileage a g6 can reach in its lifespan? Im asking because i was offered a deal on one but its mileage is really high i wanna know if its worth its price.

#11 greg on 05.23.10 at 11:03 pm

I just got my 4 cyl Pontiac G6′s fuel injectors cleaned and as well changed my driving habits to make sure i wasnt over accelerating and all. So far with 50/50 driving, i average out to roughly 27MPG. Driving at the same speeds HELPS!!

#12 Rebecca on 06.09.10 at 11:09 am

My 2009 G6 4 cylinder 2.4 liter is getting bad gas mileage too. I took the car to the dealership that I purchased the car from, Ed Rinke in Michigan, and they too said there is no reprogramming available for better gas mileage. My previous 2006 G6 4 cylinder got much much better gas mileage. My 2006 G6 got at lease 30 mpg on the highway and at least 24/25 mpg in the city. My 2009 G6 gets at most 24 mpg on the highways and 21/22 mpg in the city. My driving style has not changed in the past 6 months so that is not the reason for the change in gas mileage. I am very unhappy with the gas mileage the 2009 G6 actually receives (the sticker said 22/23 city and 30 for the highway). Does anyone have any advise as to what I can do? Is there a problem with the G6′s? I wish I could return the car because the extra money I spend in gas is really going to add up. :-(

#13 Kristina on 06.24.10 at 12:30 am

Acctually, that doesn’t sound too bad to me. I right at the moment have a poniac gxp v8 and I’m only getting 18mpg highway. I was thinking about getting one… Is the gas mileage really that bad? I want something like my car but with WAY better gas mileage. I know to get great gas mileage I would have to get something like an Aveo (which I hate) So, for the car is it an alright vehicle?

#14 Alex on 03.13.11 at 4:11 pm

i own a 2006 G6 and i just love this car the gas mileage is excellent i can ride 6-7 days on a full tank which is a good thing considering the sky rise in gas prices and i do quite a bit of driving rather its back and fourth to work or just running errands not to mention the smooth ride on a long out of town trip this has got to be the best car that ive owned this far

#15 Judy on 05.29.12 at 11:07 pm

My 2009 G-6 3.5 ltr averages 25 miles on the highway and 20 through town. Depends on how it is driven. Keeping a steady speed around 63-65 miles per hour, it gets pretty good mileage. I love the power and I have had 2.4 engines before but they don’t climb mountains very well even though they get better mileage per gallon. I have had an average of 29 miles per gallon on a trip north. That was impressive. Pontiac has ALWAYS been known for performance and GM blew it when they discontinued Pontiac because the Buicks sell better in China. I was told that was the reason.

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