Gas Mileage Problems - Pontiac G6 Forum
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post #1 of 5 (permalink) Old 10-03-2010, 04:37 PM Thread Starter
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Gas Mileage Problems

I recently just bought a 2007 Pontiac G6 Gt with 31,400 miles on it with a Cold Air Intake, and a Exhaust. The problem is I'm only getting 17mpg in the city. Please help me with ideas or a solution.
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post #2 of 5 (permalink) Old 10-03-2010, 06:41 PM
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Similar situation here, I have a 2009 Pontiac G6 GT with 60,000 miles and am only getting around 15 MPG combined city/highway with conservative driving habits.
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post #3 of 5 (permalink) Old 10-03-2010, 10:34 PM
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Worth a shot, but you could try using some Techron or Seafoam (I recommend this) to clean out the fuel injectors and such?
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post #4 of 5 (permalink) Old 10-16-2010, 03:02 PM
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I sit in the same boat as you fellas. I seriously fill up my car every 2-3 days. I find it to be lame. I have a cold air intake and exhaust. I'm not hard on the car or race it. I just don't understand. And I honestly think my car should have more power than what it has now.

2007 G6 GT Sedan Ivory White w/ 3.5L V6 Fully Loaded

Performance Mods: CRAB's O3 w/ FPU, Custom Magnaflow Dual Exhaust w/ 3 1/2 Tips, Resonator Removed, Motor Mount Inserts

Appearance Mods: HIDs Head/Fog 35w 6000k, Front/Back/Eyebrow 5% Tint, Tinted License Plate Covers, Debadged Sides/Rear but kept GT, Added GT emblems to sides, Arrowhead Overlays BLACK for front/rear - CHROME for wheels

Handle Mods: Strut Bar & Tires

Audio Mods: 2 Alpine 12" E's & Alpine 1000W Class D Mono Amp

To Do List: Dyno/Tune, Exterior White Underglows, Interior Red Underglows, Front Mud/Snow Guards, ""Painted Mirrors; Calipers; Tail Lights; Grille Insert & Assembly (All WHITE)""
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post #5 of 5 (permalink) Old 10-16-2010, 06:26 PM
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You'd be amazed what 1 clogged fuel injector can do...

I had a severe case of 'bad mileage' awhile back. I tried Lucus cleaner which seemed to clog the injectors even more. So completely fed up, I took it to the dealer and had them run a Terraclean service. They also checked plugs and re-gapped them. Terraclean is also a decarbonizing system which cleans everything. I recommend this as it helped fix my problem. I believe Motorvac is essentially the same process but I'd go with Terraclean. It runs a fuel mixture through the system which takes about 1 hour to complete. Best of luck.

2005 G6 SE 3.5L V6 LX9

Audio: Pioneer DEH-P6900UB / Rockford P300-1 / Bassworx GPH210BK / 2x 10" MTX 600W RMS
Appearance: Eagle Eye CCFL Halo Projectors w/ Stealth Bulbs / Oracle 6000K LED Fogs
Painted Tails & Brake Light / Xenon White LED Plate / Front Plate Removed / Debadged
Performance: Doctor Speed CAI / Glasspack Resonator
Coming Soon: Full TINT / GT-R / WAMS / STB

DC's G6 Progression!$#%
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