mpg question
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
I've had mine for 2½ weeks but mileage is something I've watched closely, and I do try to maximize it. So far if I can keep it <70mph on the highway it'll indicate ≥30mpg, as high as 34-35mpg @ 50mph in 6th. The key is to keep the RPMs down when possible.
As for suburban mileage I find it difficult to keep >20mpg, but I think I can stay in the low 20's using some hyper-mileage techniques like coasting when I approach areas where I know I will have to stop and even shutting the motor off at long traffic lights. After the car breaks in I expect mileage to increase somewhat, and I would like to see city mileage average around 25mpg.
As for suburban mileage I find it difficult to keep >20mpg, but I think I can stay in the low 20's using some hyper-mileage techniques like coasting when I approach areas where I know I will have to stop and even shutting the motor off at long traffic lights. After the car breaks in I expect mileage to increase somewhat, and I would like to see city mileage average around 25mpg.
Racer
Joined: Mar 2009
Posts: 327
Likes: 3
Just have a related question? I hope I didn't highjack the tread. I just bought 2013 base A6 coupe from Tommy, haven'y picked it up or rather had it delivered yet. Just hoping I would get somewhere in the mid 20's on average and with the other posts it sounds like I will. My question is they say premium gas should be used but will work on regular. Has any one figured if there was different fuel mileage using one over the other. Or should I just always use premium?
Advanced
Joined: Feb 2013
Posts: 59
Likes: 1
From: Tullahoma TN
My 08 base was getting 26-27 on my highway drive yesterday. Normally around town I get 19-20 (lots of traffic lights in my part of jersey)
Also, Willytrash, I asked this question a week ago. Everyone told me 91 octane but it's a 2 cent difference between 91 and 93 so that part is up to you. Remember that engines will run on most fuels but the compression ratio in your engine is tuned to work on 91 octane which can be compressed more without combusting. Using regular will still run the engine but you won't get the efficiency because the fuel generally has more likelihood of comubsting due to compression and not ignition. That's the engineering answer for ya
Also, Willytrash, I asked this question a week ago. Everyone told me 91 octane but it's a 2 cent difference between 91 and 93 so that part is up to you. Remember that engines will run on most fuels but the compression ratio in your engine is tuned to work on 91 octane which can be compressed more without combusting. Using regular will still run the engine but you won't get the efficiency because the fuel generally has more likelihood of comubsting due to compression and not ignition. That's the engineering answer for ya
Last edited by chandy116; Mar 23, 2013 at 03:01 PM.
Race Director
Joined: Dec 2007
Posts: 19,574
Likes: 167
From: Frederick, MD
Depends on how you drive it. Cruising at 80mph all day with stock tires I averaged 22-24mpg, Michelin Super Sports around 24-26mpg. I personally don't worry about mileage too much driving a Corvette. My main concern with mileage is being able to make it to the next town which could be 100 miles away.
I have a Vert which of course is not aerodynamic (but it is lighter) than a coupe. It gets less mileage than my 08 coupe but who cares. Seriously 24 mpg at 80mph is pretty good anyway. Push some 4 bangers like that and they'll get the same especially in the mountains where the GS doesn't care what gear it is in while the little 4 banger is complaining like crazy.
For the heck of it, we drove my daughter's 2012 Chevy Sonic with the 1.8 4 banger. At 70mph it'll get the advertised 35mpg, 80mph is more around 30mpg. It doesn't like hills and sounds like you are thrashing it when accelerating. So my GS Vert gets about 4-5 mpg less at 80mph.
Roof down or up doesn't seem to matter much at 75mph or below also.
I have a Vert which of course is not aerodynamic (but it is lighter) than a coupe. It gets less mileage than my 08 coupe but who cares. Seriously 24 mpg at 80mph is pretty good anyway. Push some 4 bangers like that and they'll get the same especially in the mountains where the GS doesn't care what gear it is in while the little 4 banger is complaining like crazy.
For the heck of it, we drove my daughter's 2012 Chevy Sonic with the 1.8 4 banger. At 70mph it'll get the advertised 35mpg, 80mph is more around 30mpg. It doesn't like hills and sounds like you are thrashing it when accelerating. So my GS Vert gets about 4-5 mpg less at 80mph.
Roof down or up doesn't seem to matter much at 75mph or below also.
Racer
Joined: Mar 2009
Posts: 327
Likes: 3
My 08 base was getting 26-27 on my highway drive yesterday. Normally around town I get 19-20 (lots of traffic lights in my part of jersey)
Also, Willytrash, I asked this question a week ago. Everyone told me 91 octane but it's a 2 cent difference between 91 and 93 so that part is up to you. Remember that engines will run on most fuels but the compression ratio in your engine is tuned to work on 91 octane which can be compressed more without combusting. Using regular will still run the engine but you won't get the efficiency because the fuel generally has more likelihood of comubsting due to compression and not ignition. That's the engineering answer for ya
Also, Willytrash, I asked this question a week ago. Everyone told me 91 octane but it's a 2 cent difference between 91 and 93 so that part is up to you. Remember that engines will run on most fuels but the compression ratio in your engine is tuned to work on 91 octane which can be compressed more without combusting. Using regular will still run the engine but you won't get the efficiency because the fuel generally has more likelihood of comubsting due to compression and not ignition. That's the engineering answer for ya
Racer
Joined: Sep 2008
Posts: 340
Likes: 10
From: Oak Brook Il
While I don't doubt the numbers quoted here by numerous helpful enthusiasts, I'm no where near that kind of mpg. My CE GS vert 6 spd is supercharged and is constantly insisting for me to feed the beast. My car is strictly for fun. If I was driving it everyday to work, maybe a different story. Rowing gears and hearing the s.c. Sing Far outweighs anyway increase in mpg. Good luck, I wish you the best and hope you guys make it happen.
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Race Director
Joined: Oct 2007
Posts: 11,367
Likes: 211
From: Edgewood Washington
St. Jude Donor '11-'12-'13-'14-'15
Wide bodied Vert, A6 with 2.56 rear end.
I can get 30+ mpg if I try. Top up or down doesn't affect this.
I aways use premium gas and keep the tires properly inflated.
Usually too busy having fun to worry about mileage though.
I can get 30+ mpg if I try. Top up or down doesn't affect this.
I aways use premium gas and keep the tires properly inflated.
Usually too busy having fun to worry about mileage though.
Racer
Joined: Nov 2012
Posts: 474
Likes: 1
From: Raleigh North Carolina
:
same in my GS M6
I've got a 6-speed, and I typically get around 18 in city, and not much more than 24 on the highway. But I don't baby my car either - I like the fun of spirited drving - not crazy, just some quick starts, etc. The only way I can reach the 26-28 mpg on the highway is if I'm staying the speed limit (something I have a difficult time doing 
). The gear ratio changes in the GS will make it hard to reach 30 mpg unless you're staying under the speed limit. I know about 8 guys with a GS, and no one (that isn't lying) says they get close to 30 on the highway. Just being honest.
). The gear ratio changes in the GS will make it hard to reach 30 mpg unless you're staying under the speed limit. I know about 8 guys with a GS, and no one (that isn't lying) says they get close to 30 on the highway. Just being honest. same in my GS M6
Thread Starter
Instructor
Joined: Dec 2006
Posts: 142
Likes: 6
thanx for everyones input. it sounds like her driving would net her 19-21 city. I know some folks are thinking you don't drive a vette & worry about fuel economy, well to her driving it every day it does matter.
Le Mans Master
Joined: Feb 2002
Posts: 5,394
Likes: 281
From: cumming ga
The wider tires and body of the GS does effect gas mileage but so does driving habits leave it in drive and stay light on gas pedal and it will give you a nice return. Oh and until the newness wears of you mileage will be lower. Oh the noise of z06 if someone pulled the fuse on the npp mufflers that will make it loud or after market mufflers. The GS has the option also available leave it alone or get a mild to wild switch to open or close the valves.
z51vett
Doug
I use to live on Parkroad going to mall area in the early 70's.
z51vett
Doug
I use to live on Parkroad going to mall area in the early 70's.
