LS2 mileage?
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
I put 70k on my 6-speed '07 Z51, locally I averaged 20 MPG, on long trips about 26 or so depending on how much fun I had 
IIRC, the C6 Z51 had same tranny ratios as ZO6, so non-Z51 mileage will be a touch better. In my LS1 C5 it wasn't unheard of to get 30+ on the interstate.
IIRC, the C6 Z51 had same tranny ratios as ZO6, so non-Z51 mileage will be a touch better. In my LS1 C5 it wasn't unheard of to get 30+ on the interstate.
Melting Slicks
Joined: Jan 2013
Posts: 2,576
Likes: 237
From: Murphy NC
I have a 2007 Base with A6.
On the highway above 70mph, I can get 30-31mpg all day long.
If I get stuck in traffic driving or below 55mph, I get 26mpg.
My speedo is exactly what both of my GPS say the speed I am going is.
On the highway above 70mph, I can get 30-31mpg all day long.
If I get stuck in traffic driving or below 55mph, I get 26mpg.
My speedo is exactly what both of my GPS say the speed I am going is.
Advanced
Joined: May 2014
Posts: 57
Likes: 6
From: SW Fl
Melting Slicks
Joined: Jan 2013
Posts: 2,576
Likes: 237
From: Murphy NC
Racer
Joined: Apr 2010
Posts: 322
Likes: 128
From: Williamsburg Virginia
I have a 05 6spd manual convert with 68,000 miles, I seldom get below 19 to 20 mpg around town in normal driving. On the highway, I have gotten as high as 29. Driving through back roads and mountains, where I normally get on it pretty good I still average over 20. By the way, the silly skip shift is disabled.
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Burning Brakes
Joined: May 2011
Posts: 1,182
Likes: 209
From: Orlando FL
Race Director
Joined: Aug 2008
Posts: 14,093
Likes: 1,599
From: Edmond Oklahoma
My 2007 A-6 with longtube headers, cold air intake, dyno tune and some other mods has seen 34 MPG at 75 to 80 MPH on 100 mile plus road trips. It is amazing the fuel mileage these cars can get.
Pro
Joined: Sep 2011
Posts: 721
Likes: 11
From: Lansing and Brighton Michigan
I get around 19 in the city but not I'm not near any big city. Mostly due to spirited driving in the 25-45 mph zones. On the highway I'll get 29-31 at 60 mph, 30-32 at 70 mph, 26-28 at 80 mph and about 25 mph when at 85-95 mph. Oh, I also get about 7 mph at the 150 mph area, when in mexico of course. 
I end up with an average of 23-24 mpg with all my driving styles combined. Now have over 60k miles and haven't seen much change over time, except when you get some bad gas. Now I only fill up at the stations I know use the better fuel.
I end up with an average of 23-24 mpg with all my driving styles combined. Now have over 60k miles and haven't seen much change over time, except when you get some bad gas. Now I only fill up at the stations I know use the better fuel.
Racer
Joined: Feb 2015
Posts: 385
Likes: 20
From: Colorado
Mileage
I can get 30 most of the time on highway driving and I averaged 29.84mpg at 100mph from Denver to Albuquerque on the backway in the mountains. 21-24 in town depending on if I get into it and how often.
Race Director
Joined: Mar 2010
Posts: 16,883
Likes: 5,342
From: T-Town WA
2016 C6 of Year Finalist
Depends on the weight of your foot and how the car is equipped. My '05 6spd with Z51 was 26-26.5 on the fwy (a/c? terrain? weather?) and I never cared but suspect 18-20 around town (the DIC avg was usually around 22).
Buy it for the fun and let the fuel mileage be a (happy) surprise. As folks say...YMVM!
Buy it for the fun and let the fuel mileage be a (happy) surprise. As folks say...YMVM!
Race Director
Joined: Mar 2010
Posts: 16,883
Likes: 5,342
From: T-Town WA
2016 C6 of Year Finalist
Le Mans Master
Joined: Jan 2006
Posts: 6,800
Likes: 2,653
From: Down south in Dixie
Mine gets better mpgs than anything I have in the driveway. '07 base with A6 avg. 18 - 19 around town, 26 - 28 hwy. On our last 5000+ mile Route 66 journey it averaged 27.6.
Disclaimer - Not that it matters. The fun far out weighs the fuel usage.
Disclaimer - Not that it matters. The fun far out weighs the fuel usage.
Racer
Joined: Nov 2013
Posts: 431
Likes: 1
From: Oconomowoc Wisconsin
From another post earlier this year:
Well I just completed my first road trip for Fathers Day, six days, 1951 miles to NC from WI...golfed my way down and then for four days with my son...may be my best Fathers Day ever!
These are the things that stood out:
Even with the Edelbrock SC installed this past winter and now 500/500 when I step on it:
* First tank with Ethanol all interstate 29.6 MPG
* Second tank no Ethanol all interstate 32.4 MPG
* The next two same...32+ MPG
* 13 hour drive straight home
* Borla S Type II are just enough...no drone on interstate...but it ain't no company car cruising down the road.
I literally could have driven the 900 or so miles on two tanks...ridiculous! AC was on all the time and saw no effect on the mpg.
2000 rpm @ 80 mph....sick!