TorchRedFred

You should be embarrassed to have your MPG be that high in a Corvette. Sir, you have brought shame to the Corvette nation.

Torchsport

I consistently find that those computers are bogus on my vehicles.
Real calculations have shown I have gotten nearly 27 on a few trips. Never checked around town.

6SpeedTA95

Really depends on the vehicle I think. Our BMWs have been basically dead nuts on. Within .1 mpg on average. Biggest diff I've ever had in my BMW was .4mpg and the onboard generally read a bit low as it did that day.

Our Japanese and American cars by contrast were way WAY optimistic with the exception of my Z06. It read slightly low, which I thought was interesting. Dunno on the GS, I'm using the onboard and not really tracking the MPG because I don't drive it often.

Bruze

My Vette was the first vehicle I've owned with a MPG calculator. When I first got it I checked the MPG the old fashioned way, and discovered the computer was quite accurate. It was, and is, just a curiosity to me, don't really care.

From what I know, "nearly 27 on a trip" is very realistic. What did your DIC show?

Bruze

Seems fishy to me. About the only way that would be possible would be to drive only interstate miles, stopping for gas, food, sleep, and some occasional stop-and-go through a town or city.

Is that mostly how the miles were put on?

I live in the country too, a lot of hills, almost no x-way driving, and I only average 20 or so per tank.

Judgebull

vezePilot

How convenient ... was going to start a fuel mileage thread. My stock '07 C6 (LS2) is getting 22.4 combination around town/highway, Boulder, CO. Running on like-new Michelin Pilot Sport A/S 3 Pluses. Had the car only 6 days, so this driving DOES include some rather Fast Launches, but perhaps not what some of you would call fast ... That image of a big city somewhere gives me the ******* nowadays, although I did learn to drive in Detroit. Will a Vararam Snake Charmer Cold-Air Intake increase efficiency at mile-high elevations? Gonna get that in a coupla weeks or so.

6SpeedTA95

Being at altitude means you're already getting better MPG than those of us closer to sea level. My experience with aftermarket intakes is that they generally only slightly improve MPG, but sometimes they sound better so you find yourself getting worse MPG to hear the noise.

Also, some after market intakes make engines more susceptible to picking up water and that can be hugely problematic. Dunno much about the snake charmer.

HOXXOH

Just for fun one day I hit the cruise at 140 MPH, then hit the MPG reset. A couple miles later before I slowed down the DIC read 18 MPG.

On my 5,500 mile trip home from the dealer, I got 27 something and when the odometer said 25K it was nearly the same. However, I had several long road trips during that first year.

Most local Phoenix area driving is around 18-22, depending on traffic. I have a 4K stall converter, so that kills mileage now. With the converter locked in 6th, I get 38-40 on a level road at 55 MPH.

The road surface can make up to 2 MPG difference. Driving through West Texas on I-10 one day with the DIC set on instant MPG, I saw a 2 MPG drop when the road surface changed at a county line. The next county it went back up. I was intrigued, so checked again on the return route and it confirmed the same numbers.

The bottom line is that many factors affect mileage. Be happy you can drive a serious performance car and still use less fuel than lower powered cars did 50 years ago.

Johnathon59

'13 M6 around town=18, Highway=27

Bruze

Attachment 48331950 Good info, Hox! I especially like your last sentence; these cars are pretty amazing -- all things considered.

Not So Fast

Now where were you Tom that you could hit the cruise at 140mph for a sustained distance, I'm pretty brave about doing it for a very short distance and in an area where my 2 sons patrol but that's about it. LEO frowns on that kind of speeds very seriously
NS

Vet Interested

The car DIC is ALWAYS off by at least half a MPG. I average 24.4mpg at
86MPH....San Diego to Eloy, AZ....last week.

hotinaztoo

ls2 6 sp manual, 20-21 town & short runs 30-32 long trips, not a ls3 but only 12 cu in bigger.

Corvette_Ed

I usually shoot for 12-14 mpg, or lower if I can manage it. For me the lower the mpg I can hit, the more fun I'm having. I didn't buy my car for gas mileage. I bought it strictly as a means to provide me with the pleasure only a Corvette can.

Bruze

Same here! Attachment 48341433


Ed, did you know that in your "Blinker" thread you've been tagged as a "troll"?

Some people are just wound too tight and seem incapable of joking around -- or of understanding it when others do it. I don't get them, but what I do get is that life is short, there are no second takes, so enjoy the journey.

HOXXOH

There's a couple places in AZ where you can see no other cars for miles, but NV has lots of places. I'm just not going to name those places in a public forum.

Mileage is starting to creep up and loosing confidence in the car. I might decide the speeds at the 1/4 mi finish are all I do anymore. The peak at 180 (no photo) was 7 years ago when I was still in my late 60's and too dumb to know better.

mkitt27

I just happened to take a trip to see my folks today and put on 280 freeway/country miles. I filled at the start and finish, put on 280 miles. DIC said 27mpg, actual was 25. Still not bad for a Z06 I think. Around town I get 16-18 on the DIC.

The other cars I've had with economy readout have also been optimistic 1-2 MPG, 2 BMW's and my wife's Escape.

LowRyter

it's always a challenge to drive for gas mileage. Coast, don't use brakes, keep momentum in curves. Let inertia work for you.

Driving for mileage takes some skill. It requires practical knowledge and is a method of performance driving. Amazing when I see people tailgate and hitting brakes, running up to stops rather than coasting through.

owc6

My observations:

LS2 19 mpg.

LS7 21 mpg.

LT1 17 mpg.

LS3 crate engine in a 2005 A4 23 mpg.