42mpg hwy? I'd be willing to bet that no one will ever come close to that.

 

down hill maybe...

 

SS L99
22.0 highway with DOD off
Florida to Michigan

 

There are lots of ways to alter your driving style which will improve your fuel mileage. It's a bigger influence than tire pressure, spark plugs, gee-whiz aluminum baffles that you put in your intake tracts, etc.

1) Rarely ever exceed 2000 RPM when accelerating. Short shift every shift. Use 10% throttle and let everyone but the school bus pass you as you slowly build up your velocity.
2) Rarely ever exceed the speed limit, and when you do, make sure it's only for a short time.
3) Try to time the stoplights by looking up the street a few blocks. If it looks like you'll have to stop, put it in neutral, and coast a few blocks, letting your car slow down naturally. It'll conserve your momentum. Turn the car's momentum into heat energy by using the brakes and you'll have to put that energy back into the system by consuming fuel. If you can get to the intersection just as the cars in front of you start moving through, you can keep rolling and save your momentum.
4) Always drive like you have an open pitcher of soda-pop on your dashboard, and a case of nitroglycerine in your trunk. Make all corners smooth: Look for, and use, the late apex of each and every corner so that you don't have to slow down as much when you make your turn.
5) Inflate your tires to 40 PSI. No, really! Your cornering will feel better and your rolling resistance will go down. You might hear someone say that there will be some advanced tire wear down the center of your tire, but in all of my years of over-inflating, I've never had it happen to me personally. I always use up the edge of the tire first.

The idea is that when you are in regular driving mode, just doing the everyday slog of getting from point A to point B, make it slow and smooth. It'll conserve fuel, brakes, and make your car last longer. It'll also improve your racing skills if you are working on momentum conservation and late-apexing your corners each and every day.

Then when you are looking to enjoy some spirited driving, go for it and invest the fuel, oil, and rubber in your fun without guilt.

As an aside, my '06 Chevy Avalanche 4x4, which is not known to be the most fuel efficient vehicle on the planet, it gets 14.4 MPG around town, and 19.2 MPG on the highway when I am granny-driving it. When I drive it like a regular schmoe, my highway mileage drops to 16 and my around town mileage drops to 12.8 MPG. That's a difference of eleven percent city, and seventeen percent on the highway. These techniques work, and your 18 MPG combined city/highway should jump to 21, 22 MPG if you follow them.

 

07/10 build 1SS, 11.3 city and 19.6 highway, CAI from Volant and Catback Flowmaster exhaust. My driving isn't anything like the above post!

 

2011 2SS/RS M6:

18 mpg city/highway (30% / 70%) - mostly to and from work
22 mpg highway (San Diego to LA)

Injen CAI, Magnaflow 3" catback exhaust.

Side Note: I noticed 1-2 mpg increase after I installed the 3" exhaust.

Try to drive pretty conservatively with occasional hard acceleration (to the redline).

 

2010 RS/SS L99
Wilmington, NC --> Charleston, SC
ave MPG = 25
Ran about +5 over Speed Limit.

This is not too bad for 400hp.

 

I average around 18.5 with a lead foot in mostly city. LS3 M6

 

I dont know how gm comes up with the 29mpg figure, but remember they also listed the 4th gen v6's to get 31 mpg but they never did, I've had a v6 4th gen since 2003 and the best it ever did was 27 on road trips, it averages about 24 on the interstate in the mountains and I have never ever gotten below 20. but these are not bad numbers for a car with it's size & power. no one buys a camaro with the expectation to get great MPG's.

 

 

Around town I'm getting around 17 mpg. Best mileage acheived so far for hwy is 27.5 mpg on a recent trip I took. never did above 68 mph on that trip however and there were lots of 55 and 45 mph zones I went through.

 

1LS, 2800 miles so far, curretly averaging 24.8 MPG, 75% HW, 25% city. It's about what I expected. anyone thinking this car would get the same mileage as a 4 banger with 1000 pounds less weight is just dreaming.

for a true city driver, a camaro is a terrible choice, it's too big, too fast, bad city Mpg's, no rear visability and a PITA to park.

 

No posts in a while but here is mine :20mpg mixed 50/50 2010 2SS/RS A6

 

My mileage has improved,its now 22mpg mixed and that included 5 WOT dragstrip passes.

 

Browse All Cars | Fuelly

This is a great site to compare MPGs if youre interested. Consequently, it also where I track my 4th gens mileage and my DDs mileage. They have a mobile app that makes it easy.

Edit - Wow this is an old thread. Well, the information is the same and still useful.