YSILT1

iTrader: (6)

I am in the market of trying to find a daily driver that will get me better MPG from my supercharged Tahoe and my 800 RWHP Trans AM.

I have always loved these cars and I am trying to see what the real world MPG is on these cars.

My truck gets 13 mpg and the trans am gets 9 to 10 mpg in town. So I am guessing it has to get better than these.

Thanks.

thechef

iTrader: (13)

mine varies from 19-22mpg and i do 80mph all the time..lol

mtocrs1

I hope they get better than that running 70mph. I am picking up a new to me GT this weekend and I drive 120 miles daily!
Over on the G8 board guys claim mid 20 mpgs

Compg

Took a friend to the Air Port yesterday. 2 hour round trip and reset just when I left. Got home and averaged 26.2 with an average speed of 67 MPH for the trip. That's with my mods in sig. Not bad for a 4k lb family car that runs 12.5s.
Tate

YSILT1

iTrader: (6)

Thanks. Thats exactly what I wanted to hear.

Know I guess the decision is, Grey or Stryker Blue.

The goal of the car is to make a wicked cool daily that I can take on some amazing road trips in.

dragonrage

I average about 19, but I beat on my car like crazy.

Rawyzf

Yeah, I am in the 19-21 range with 60% highway, 40% city.

rlwjr1

I drive 50 miles a day round trip. Usually 50/50 highway/city. I've been getting 18.0-18.5 without trying. Hope this helps.....

hivoltagedriver

iTrader: (1)

I've been averaging 16-18 with mostly around town (spirited) driving. On highway trips I was getting 25+ before my CAI and tune. Hoping I gained a little there, but I haven't had a chance to check it yet. A tune makes all the difference in the world on how these cars drive though.

johnbell2

19-20 mpg in mixed driving. Highway I usually get 26 mpg on 70mph cruise control. Mods in sig. You don't have to lose mileage with a cam setup if the combo is right and tune dialed in.

Mileage usually looks like this with 50/50 city/hwy... for comparison I used to get 18-19 mpg on the same circuit in factory trim.

dragonrage

Very few mods will make you lose gas mileage if you can resist the temptation to drive faster. If you can't resist, gas mileage could suffer quite a bit

johnbell2

I hear that! I've seen my share of 14-15 mpg tanks

2002_Z28_Six_Speed

iTrader: (19)

I get about 16-18 MPG and I drive 90% rural highway (60 mph) and rural Istate (78 mph). Kind of hilly.

Stock I got about 20-21 driving around.

1slow01Z71

iTrader: (36)

What are the specs on your cam?

Devilish34

iTrader: (2)

I got a nitrous kit with your name all over it

johnbell2

The usual - 218/230 0.600/0.600 115+3 - nothing fancy.

cutlass_455

iTrader: (2)

I just got 24mpg on a highway trip with the wife, 2 year old and 3 month old, and trunk full of luggage and stuff in the interior too doing around 70mph.

Oh and if you get Styker Blue, Ill be so jealous!!! These cars look awesome in that colour.

WhiteKnight '01

You probably already know, but the L76 in the G8 GT has AFM (Active Fuel Management). So at highway cruising nspeeds, (65MPH and less I believe) it will shut off 4 cylinders.

The car is rated at about 15 city/24 highway by most reviews. I have a friend who has one, he swears up and down the aisle that he gets 27MPG going 70MPH in stock form.

1slow01Z71

iTrader: (36)

The wide lsa is a big reason for such decent mileage for a cammed vehicle. Wouldnt happen to have a sound clip would you? Thats a good cam for a maggy

johnbell2

Dyno sheet, the bottom line is stock tune with CAI installed. Full stock baseline was 294 rwhp / 313 rwtq:



Sound clip of cold start:

http://www.youtube.com/watch?v=XxsX96BjBdY

This car is my daily driver. Mods resulted in +113 rwhp / +77 rwtq from stock baseline. Worst case I get the same mileage as I did stock under normal driving conditions, most of the time I get +1 mpg vs. factory. We have lots of hills in Austin, AFM would cut out so much it was little help in the mileage department. Between that and the reliability concerns it's not missed.