Real world g8 mpg?
05-17-2009, 12:29 PM
#21
Staging Lane
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Sorry, i'm new to the site, if you can't tell by my post count. I'm trying to decide between a 2010 Genesis cope, 2010 1SS Camaro, and a 2009 G8 GT.
Anyways, what the heck is this DOD I'm seeing you guys talk about? If you're getting 27+ mpg (highway), this might be the decision makes for me. I would love to have a V8 getting that kind of mpg. I do mainly highway driving.
Anyways, what the heck is this DOD I'm seeing you guys talk about? If you're getting 27+ mpg (highway), this might be the decision makes for me. I would love to have a V8 getting that kind of mpg. I do mainly highway driving.
Larry
06-10-2009, 01:53 PM
#22
Just got back from a 1600 mile highway only trip. With four people and a trunk full of luggage I got 23.7mpg according to the DIC, hand calculated 23.5 so thats close. Average speed on the DIC was 72mph. I'll take that on regular gas, kicks my old TBSS's *** on mileage thats for sure..
06-10-2009, 05:01 PM
#23
My 09 GT is at 20.1 mpg according to the dashboard computer. Mixed city and Hwy driving. Still pretty new with only 800 miles on the clock. Still expecting some improvement with a few more miles.
Like everyone else is saying, take it easy on the loud pedal and you'll be ok. It is nice to know though that it's got some serious stones if you want to nail it.
Like everyone else is saying, take it easy on the loud pedal and you'll be ok. It is nice to know though that it's got some serious stones if you want to nail it.
07-03-2010, 10:57 AM
#25
Sorry to bring an old post up but the lady is looking at getting one (well I talked her into it 
). She travels 90 miles a day to work and back, she wants an auto (ugh) but its her car, not mine. What are you guys seeing with the A6 G8 GT? Any results with the 3.6L as well? I am thinking the 6.0L might do better than the 3.6L on fuel? I have read the reviews for fuel mileage but I am looking for real life results.
Thanks,
Ryan
). She travels 90 miles a day to work and back, she wants an auto (ugh) but its her car, not mine. What are you guys seeing with the A6 G8 GT? Any results with the 3.6L as well? I am thinking the 6.0L might do better than the 3.6L on fuel? I have read the reviews for fuel mileage but I am looking for real life results. Thanks,
Ryan
07-03-2010, 11:54 AM
#26
On The Tree
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For a G8 GT
Stock: Highway ~70 mph about 24 mpg
Around the City 16-22 mpg (heavy foot more toward the 16)
Mixed driving figure avg 19-20 (about the same as a minivan)
Stock: Highway ~70 mph about 24 mpg
Around the City 16-22 mpg (heavy foot more toward the 16)
Mixed driving figure avg 19-20 (about the same as a minivan)
07-03-2010, 02:03 PM
#28
I would like to update my MPG ratings. I am not sure if it is the gas or time of year but for my M6 GXP:
18 tank to tank w/o caring about conserving fuel.
20 tank to tank when i try.
23 on the interstate.
Peak instantaneous fuel mileage while holding speed at about 50 MPH in sixth is 31 MPG.
18 tank to tank w/o caring about conserving fuel.
20 tank to tank when i try.
23 on the interstate.
Peak instantaneous fuel mileage while holding speed at about 50 MPH in sixth is 31 MPG.
07-03-2010, 02:13 PM
#29
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Im getting right at 20 mpg mixed highway/city on every tank. I have got 25 mpg on the highway and thats the best I have seen in my car. Never seen the 28 mpg some claim to get. ???
07-05-2010, 09:55 AM
#32
I would like to update my MPG ratings. I am not sure if it is the gas or time of year but for my M6 GXP:
18 tank to tank w/o caring about conserving fuel.
20 tank to tank when i try.
23 on the interstate.
Peak instantaneous fuel mileage while holding speed at about 50 MPH in sixth is 31 MPG.
18 tank to tank w/o caring about conserving fuel.
20 tank to tank when i try.
23 on the interstate.
Peak instantaneous fuel mileage while holding speed at about 50 MPH in sixth is 31 MPG.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
07-05-2010, 12:49 PM
#33
Yes, on the red GXP the fuel mileage did increase a point and a half. Power as well.
Haven't tried to tune the black one yet. We were going to put it on the dyno the other weekend that I called you but the shop owner needed to roll out early that Saturday so we only tested the red car.
Haven't tried to tune the black one yet. We were going to put it on the dyno the other weekend that I called you but the shop owner needed to roll out early that Saturday so we only tested the red car.
07-06-2010, 09:51 AM
#35
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i got a cold air intake and tune and the DOD turned off and i get around 16-21 normal but thats idleing a lot if i go some were and don't let it sit and idle i get 20-25 and interstate i get 28-32 on flatter roads like I10from texas to mississippi and 26-28 on not so flat interstate roads
