| G8 General Tech/Discussion G8 general tech and discussion area. |
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10-16-2010, 09:46 PM
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Ultimate Warrior
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Join Date: Mar 2002
Location: Connecticut
Posts: 9,567
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G8 V8 MPG
What are you guys getting for MPG, A6, M6, GT, GXP?
I'd like to upgrade my DD to something with balls. Tired of the Outback.
Thanks-
John
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10-16-2010, 09:55 PM
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Ultimate Warrior
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Join Date: Mar 2005
Location: Newtown, CT
Posts: 15,453
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Winter's coming, wait til spring.
__________________
Some guys they just give up living
And start dying little by little, piece by piece,
Some guys come home from work and wash up,
And go racin' in the street.
Bruce Springsteen - Racing In The Street - 1978
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10-20-2010, 08:39 AM
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Ultimate Warrior
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Join Date: Mar 2002
Location: Westerville, OH
Posts: 1,441
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Uh, the way i drive my G8GT....14, 16 if I'm lucky! Get one, get a tune and you'll do low 20s easily. Whatever you do buy now, deals abound especially if you are looking for a summer only G8 setup, slap on some blizzaks and go!
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1969 Judge (Liberty Blue / Blue, 4SPD)
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10-21-2010, 07:01 AM
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Senior Member
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Join Date: Nov 2005
Location: Villa Rica, GA
Posts: 176
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'09 G8/GT mpg A6 V8 with 26000 miles on car
My car is bone stock.
Conservative driving nets me 20mpg plus just 'bopping around'. Best highway driving on interstate trip netted 28.7 mpg (that's my best so far) using cruise control as much as possible. These are calculated mpg's not from the DIC - tank topped off at fillups and calculated mpg re. odometer miles driven using 87 octane gas. Keeping tire pressures at optimum (for me): 35 psi fronts and 38 psi rears - cold pressure - contributes to good mileage due to low rolling resistance. Conservative starts from a stop and letting the car slow down naturally when having to stop always helps. Remember that anytime you brake you are absorbing power used to move the car forward, thereby wasting energy (and gas).
Yes, I know that this sounds like boring driving, but the result is better gas mileage, extended brake pad life, tire life, and transmission life. I'm not saying I don't step on it occasionally because I do, but that's when it's 'needed' for whatever reason (you figure that out). I've had hi-performance cars most of my more than 57 years of driving life and still enjoy the 'surge' when the opportunity presents itself, but constantly driving a machine in 'performance mode' because you can doesn't reward you with good mpg
Have fun, but above all be safe. 
grandpop09
Last edited by FHummel; 10-21-2010 at 07:13 AM.
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10-19-2011, 03:38 PM
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Senior Member
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Join Date: Dec 2004
Location: United States Of The Offended
Posts: 156
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we just traded
we just traded the wife's 99 C5 for a 09 G8 GT. we needed something that is capable of towing our 21' Checkmate, & a G8 is the only vehicle out there that can tow the boat & give me a little bit of excitement.
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67 firebird, RPE built 274ci TA Performance Buick V6 block, 8.89@154.85 with just a few bolt ons, & a 275 DR.
anyone can restore 1 it takes a real man to cut 1 up!
99 Western Star 500hp 52' lowboy Mid Atlantic Heavy Hauling
Those Old Timers That Think...
There Is No Replacement For Displacement
Do Not Know What Boost Is.
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10-19-2011, 09:36 PM
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Chief Ponti-yacker
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Join Date: Feb 2008
Location: Glasco, Kansas
Posts: 980
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2009.5 GXP A6 10,000 miles I can average right at 22/23 on the interstate long trips, that at 70+
Have no idea on around town driving as the closest "town" is 50 miles away.
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10-21-2011, 11:42 AM
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Ultimate Warrior
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Join Date: Mar 2002
Location: Westerville, OH
Posts: 1,441
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Quote:
Originally Posted by Turbo Indian
we just traded the wife's 99 C5 for a 09 G8 GT. we needed something that is capable of towing our 21' Checkmate, & a G8 is the only vehicle out there that can tow the boat & give me a little bit of excitement.
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Pics of said tow vehicle in the act? Love it!
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1969 Judge (Liberty Blue / Blue, 4SPD)
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10-21-2011, 08:01 PM
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Senior Member
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Join Date: Dec 2004
Location: United States Of The Offended
Posts: 156
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Quote:
Originally Posted by HUMBLER
Pics of said tow vehicle in the act? Love it!
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well since I told the salesman at the stealership the car better be right, we can not pick it up until Sunday or Monday. then I still need to build a hitch for it since you can not buy a hitch in the US that is capable of towing 3500 lbs.
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67 firebird, RPE built 274ci TA Performance Buick V6 block, 8.89@154.85 with just a few bolt ons, & a 275 DR.
anyone can restore 1 it takes a real man to cut 1 up!
99 Western Star 500hp 52' lowboy Mid Atlantic Heavy Hauling
Those Old Timers That Think...
There Is No Replacement For Displacement
Do Not Know What Boost Is.
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09-27-2012, 02:03 PM
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Administrator
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Join Date: Dec 1999
Location: Max Performance Hatfield, Pa
Posts: 4,701
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Got 27 mpg doing 70mph on a 60 mile trip. Stock.
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Fool Around, Get Hurt, Don't come Crying to me.
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09-27-2012, 07:03 PM
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Member
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Join Date: Nov 2009
Location: Heartland, USA
Posts: 34
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My 09 G8GT gets 18MPG around town and up to 25MPG on the highway. I drive 80-85 MPH so YMMV.
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1971 455 H.O. Tropical Lime
2009 G8GT Black
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09-27-2012, 09:28 PM
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Senior Chief
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Join Date: Jan 2004
Location: PA
Posts: 475
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Quote:
Originally Posted by Harry71GTO
My 09 G8GT gets 18MPG around town and up to 25MPG on the highway. I drive 80-85 MPH so YMMV.
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Thats exactly what my 09 GT is getting. Sounds like our driving styles are the same lol. Some mornings its tripple digits just depends on traffic. Its nice that you dont have to beat on it to get it there. It just wants to go!
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69 GTO Judge
69 Firebird Trans Am clone
76 Trans Am 400 4spd.
06 GTO M6 18's red/red - 1 OF 188.
09.5 G8 GT Stryker blue met. premium with sport pkg.
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10-01-2012, 08:49 PM
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Senior Chief
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Join Date: Jan 2004
Location: PA
Posts: 475
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Highway ride home from work today. Normal driving @65mph
__________________
69 GTO Judge
69 Firebird Trans Am clone
76 Trans Am 400 4spd.
06 GTO M6 18's red/red - 1 OF 188.
09.5 G8 GT Stryker blue met. premium with sport pkg.
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03-07-2013, 02:37 AM
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Member
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Join Date: Jun 2006
Location: AR (now)
Posts: 75
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G8 GXP 6M, average 20 mpg. Have gotten 25.6 best on Hwy and about 16 worst in a lot of "spirited" stop & go driving.
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10-02-2013, 12:05 PM
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Late Model Moderator
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Join Date: Oct 2013
Location: CT
Posts: 27
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my MPG is usually at 18-20 and I drive 80mph everywhere lol
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2009 Stryker Blue G8 GT Roto Fab CAI and OBX Axleback, Cross Drilled & Slotted Rotors, HAWK Ceramic Performance Pads
2001 WS-6 Edelbrock Heads, KOOKs 1 7/8 headers and ORY, ESP 228 cam, SLP UD, F.A.S.T 92, NW 92 TB, NX Plate kit, SPEC 3X, Full BMR Suspension, MOSER 9in
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12-18-2013, 03:07 PM
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Junior Member
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Join Date: Dec 2013
Location: Oak Ridge, TN
Posts: 3
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08 GT with CAI and a tune.
I run 93 octane because of the tune, and I can get 26-27 on a long trip. Normally high teens/low 20s in daily mix of highway/surface streets.
Here is the interesting thing, I bought the tuner solely to turn OFF the annoying DOD (the thing that makes it a 4cyl to "save gas") and my MPG didn't move an inch. If anything the 93 tune probably moved it up a little.
So for MPG, you can get away with a tuner and slapping that bad boy in 8cyl all the time and not lose a thing (good excuse anyway).
__________________
-Jon
2008 Pontiac G8 GT (One of those LM guys)
1967 Chevrolet Camaro (ugh and a Chevy guy)
1973 Jeep CJ-5
2000 Jeep Cherokee Sport (DD)
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