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Pontiac G6: Real World MPG

52 messages,  Last post on Jul 23, 2012 at 10:43 AM

You are in the Pontiac G6 Forum.

What is this discussion about? Pontiac G6, Fuel Efficiency (MPG), Coupe, Convertible, Sedan

Messages Page 4 of 6

#31 of 52 Re: 2007 pontiac g6 bad gas mileage [mgarcia2411] by bud35

Jun 12, 2008 (5:55 am)

Replying to: mgarcia2411 (Feb 08, 2008 4:15 pm)
My 2008 4 cylinder G6 with 3000 miles behaves the same way your car does. The mileage is TERRIBLE. That's why I'm searching the net. Sorry to hear about the dealer experience, I'm bringing mine it tomorrow to have them look for an answer to the mileage issue. I've never had a car that averaged under 25 mpg. I'm getting below 21. ARG. Please post again if you find any answers and I'll do the same.

#32 of 52 G6... get the V-6 by wjtinatl

Jun 20, 2008 (5:57 pm)

I don't own a G6, but travel extensively and get them (and Saturn Aura's) as rentals quite often. My experience is the 3500 V6 will get an average of 25-27 mpg in mixed highway/city driving. Same with the Aura and Impala that share this engine. 4 cylinder G6 and Aura only get 20-21 at best. The earlier post regarding axle ratio is right on, the V6 is relaxed at 2000 RPM at 75 mph, the 4 cyl. runs at 3000 RPM. It's pretty obvious to me that GM created the 4 cylinder G6 and Aura to compete at a lower price point, not to offer a more economical car. However, 4 cylinder or 6, all these mid-size GM products have brake rotors that warp within 12,000 miles.

#33 of 52 Re: 2007 pontiac g6 bad gas mileage [mgarcia2411] by vms

Jun 28, 2008 (8:07 pm)

Replying to: mgarcia2411 (Jan 12, 2008 10:36 am)
I have a 2006 3.5L V6 GT. Around town I get 22-23 mpg. When the car was new it got about 19.5 around town in the same commute, and then it slowly drifted up to about 22.5. When I go out on the road I will get up to 29. I wonder if your tire pressure is ok, or if you need a four wheel alignment. With the 4cyl you should get a couple miles better than I do. Do you close the windows when you are on the highway? When I let the tire pressure go down the mileage goes down. I use the mileage indicator to learn when I need to add tire pressure. Otherwise I am not sure what the problem would be. I can bring the mileage down to 19.5 if I stand on the gas all the time. If the mileage stays down, bug the dealer to find out what the problem is. Something is wrong. Best of luck.

#34 of 52 Re: 2007 pontiac g6 bad gas mileage [mgarcia2411] by vms

Jun 28, 2008 (8:20 pm)

Replying to: mgarcia2411 (Jan 12, 2008 10:36 am)
Oh yeah, do you shut off the air conditioner when you don't need it? That costs about 2-3 mpg. Good luck.

#35 of 52 Re: 2007 pontiac g6 bad gas mileage [vms] by fxr884

Jul 16, 2008 (11:42 pm)

Replying to: vms (Jun 28, 2008 8:20 pm)
Do you reset the MPG before long highway trips or after? Before I go see my girlfriend who lives about 2 hours away, I reset it just before I hit the highway to get a more accurate reading I also reset it again once I get into town. I have the 2006 V6 Sedan and initially i used to see really crappy readings, Im not sure how it was set before I got the car but after I reset it I get around 31 on the highway and about 22 in town. Slowing down does help to I slowed just a little on one of my long trips(usually average 70-75mph) and I got an average of 33.6mpg on that trip

#36 of 52 Re: 2007 pontiac g6 bad gas mileage [vms] by packer3

Jul 17, 2008 (5:07 pm)

Replying to: vms (Jun 28, 2008 8:07 pm)
There is no problem thats the way it is going to be all the time there is no fix, had a 05 Malibu V6 16mpg was tops in the city and 37mpg was tops for the highway returned it after 23,000 miles it was leased. I went throgh the same thing with the dealer they give you the we cant find anything, however in reality they know the answer, when you talk to other people "live" not blogs, you will find some of your answers.

#37 of 52 Don't trust the mileage computer by elkbow2003

Dec 30, 2008 (5:30 am)

Don't trust the mileage computer to be accurate. Check it by dividing the gallons used into the total miles traveled on the tank of gas. Then reset your mileage and check another tank. The best way to get an accurite reading is run 4-5 tanks of gas and check the mileage using all fuel used and all the miles driven. (IE 75 gallons used in 2025 miles = 27mpg)
 
I've seen the mileage computers be off 5 mpg or more.I have a 2004 Chevy truck that was off about 1.5 mpg consistently. It always got about 1.5 mpg less than the computer said it got.

#38 of 52 09 2.4 mileage by gonogo

Jul 31, 2009 (8:11 am)

Just made a 500 mile trip at 70 mph, some a/c, got 31.5 mpg, I can live with that.
It was gallons divided by miles.

#39 of 52 Re: 09 2.4 mileage [gonogo] by pbowler

Sep 16, 2009 (5:19 am)

Replying to: gonogo (Jul 31, 2009 8:11 am)
Mine is a 2009 4 cylinder with the 6-speed auto "Sport Package". I already have more than 15,000 miles on it. The mileage with this package is satisfactory. I consistently achieve more than 420 miles per tank and average a little over 30 mpg overall. My work commute is highway, seldom stop and go, making the mileage easier to achieve. I have occasionally achieved 32+ mpg for a tankful (doing the math), but it is usually a little lower. It does not often achieve the EPA rating, but then few cars do in the real world other than hybrids or diesels. The only indicator I watch is miles left per tank; The mpg indicator is only useful to monitor driving habits, not for accurate, achievable measurements.
 
For the total package considering size, roominess, comfort, performance, I am reasonably happy. We will see about long term. I am used to taking my cars to 200,000 miles but do not expect that of this car. I have owned mostly VW or Subaru over the years.

#40 of 52 Re: 2007 pontiac g6 bad gas mileage [mgarcia2411] by pennie3373

Feb 23, 2010 (1:39 pm)

Replying to: mgarcia2411 (Jan 12, 2008 10:36 am)
I have a 2008 Pontiac G6 4-cylinder sedan and I drive short distances. I drive approximately 4-5 miles per day with the longest distance without stopping being 6-10 blocks. I average 14-15 miles to the gallon. The sticker in the car says that I should be getting 22 so they say to figure 2 below that for a more accurate estimate. I am not getting anywhere near this. I average less than 200 miles per tank and it is absolutely ridiculous. I am so disappointed in myself for buying this vehicle. I am going to lose a heck of a lot of money off of it between licensing it and paying to fill it up constantly.

Messages Page 4 of 6

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