FCar2000TA

iTrader: (7)

for some reason I'm thinking about this... I remember someone saying that highway MPG is in the mid 20's with a 427. Just wondering. any inputs?

Mr.427

I get about 26MPG on highway only driving with a 427.

gnx7

iTrader: (28)

Mr. 427- What gears do you have out back and what size cam are you running? Are you are speed density....?

mike c.

iTrader: (1)

who cares about gas milage. the 402-427 is for smoking mustangs and other ugly cars.

TryingT/A

iTrader: (5)

ls7 zo6 is rated 18/26 mpg. Don't know the exact rating on c6, but it's a bit better than the 7 liter (on gas mileage)

11 Bravo

iTrader: (3)

Same here.

WKMCD

iTrader: (2)

speedracer5532

iTrader: (8)

I have a 402 solid roller with 4.30 gears and I can get 23 mpg.

98Z28MASS

iTrader: (6)

For gas mileage forget the 402 or the 427 and get a built VTEC. Kidding but if you have an M6 and your on the highway cruising in 6th gear you can get some pretty good gas mileage. I would get around 28-29 mpg on the highway in my cammed camaro so im sure if you keep the rpms down you could see mid 20's in a 402 or a 427.

slt200mph

iTrader: (42)

LS2 powered C6 Corvettes get 28 MPG on the window sticker and in real world applications too....

NORTY

I set the cruise @ 75mph and get 31mpg. I drove from Carson City to Vista non-stop. That's 510 miles. I had to pee when I got home! Took me about 8 hours. Car ran great! It sure is fun blowing past traffic in the high desert!

Kounsy

i have a 402 with a huge cam, bigger injectors, heads and ect. with a 3.42 i bet i dont get 7mpg anywhere, which its not fully tuned yet but still and it was with a 6 speed till second gear got ripped out so now im going with a th 350 turbo

squealingtires

iTrader: (14)

I just got 24.2mpg on a 4 hour trip, cruise set at 70mph in a 2000 T/A 402ci with the LS6 cam. Mail order tune as well.

Kounsy

Mine also has a slobber cam and a stock 3.42's right now, thats one reason the gas sux

Z O SICK

iTrader: (1)

I got an average of 26.6mpg from Houston all the way to AZ. Again this is just and average. I saw as much as 34.2 on the highway @ 60-70mph. I have a 402 btw.

v-8

34 MPG WTF thats insane mileage. I get 15-19 .

speed_demon24

iTrader: (6)

You have enough money to put in a 402 or 427 and your worried about gas millage?

DrkPhx

iTrader: (15)

What's wrong with trying to maximizing mileage with a big cube setup? Isn't that a benefit of having a modern EFI engine with an overdrive transmission? Even with my A4, 3.73 gears and 4000 stall I squeaked nearly 16 mpg driving to the track and back. Of course not as good as a M6, but still respectable for this setup.

11 Bravo

iTrader: (3)

You're worried about gas milage after you grow broke building the motor

1CAMWNDR

iTrader: (21)