1nasty86

iTrader: (63)

i have a ls2, tfs 225 heads, 239/246 112+3 cam, fats 102, full exhaust, circle d 4k converter and a ford 8.8 with 3.55's and a 26 inch tall tire and on the interstate im getting 14-15 mpg running about 70-75.... does this sound about right? i figured it would be better than that.. that was with me and my girlfriend so the car total would have weighed around 3600 ish lbs.. i figured it would get like 17-18 but who knows...

NVR_SPDS

iTrader: (39)

My car is alot milder than yours, but it gets about 19.5 average with city/highway driving. Im sure it could be better, since I like the loud pedal alot lol.

My WS.6: AFR 205s, 224/228, SS3600, FLT Level 3, 3.73s

RevGTO

iTrader: (12)

That's a stout cam, but even so I would expect about 17-18 on the interstate as you say. Have you been dyno tuned or street tuned with a wideband?

mjs1012

iTrader: (36)

i havent really payed attention to mpgs but id have to say low 20s cruising at 65-70 on the highway. i have ss3600, stock 3.23s, and a tune.

exodus_gs1

iTrader: (3)

Yea its all in the setup, my t/a was stock and had 2.73's and got 26+ but in my Camaro with 4.11's and full exhaust running open cutout I get 16... Maybe. But I agree with above you should be getting better. What is your cruising rpm

mjs1012

iTrader: (36)

is that 16 mixed city/highway driving??

exodus_gs1

iTrader: (3)

mainly highway, I drive about 5 miles through town then 30 on the highway. Thats what I drive one way to work on Monday then do it again on the way back on sat... Sucks. But with the right size tires it will help with your cruising rpms to help get better mpg's at least on the highway. I'm getting some 28's and that will drop my rpms by about 600 rpms.

badformulaLS1

iTrader: (1)

My car bone stock gets 290-300 miles per tank all highway. Which is only like 17.5 mpg. For the most part I'm pretty light on the pedal. So I feel like thats a problem now that I'm reading people saying they get 20+.

exodus_gs1

iTrader: (3)

Yea in my t/a bone stock I would hit 300 with a 1/4 tank left. That was going easy mainly highway and 2.73's so if you have the more popular 3.23's it may be a little less but that still seems really low. Maybe you aren't as stock as you think or are in need of a tune up. I know when I put new tires on the front I got a little better... Not sure why but ill take it

badformulaLS1

iTrader: (1)

I do have 3.23s so that might hurt a little. But I know my car is bone stock. Nothing aftermarket on it except for C5 wheels and the radio. (I'll be popping the stock cherry tomorrow with an slp lid haha) I did have really worn out front tires on that trip though so that and 3.23s might have been enough to drop me a couple mpg.

RevGTO

iTrader: (12)

What's your typical fill up? Our tanks are 16.8 I believe, but I don't think I've ever filled up more than 15 gallons. At 15 you're getting 20.

That being said, with 3.23 gears and otherwise stock, you should pull 23-24 hwy.

eb02z06

iTrader: (18)

Around 20-22 on the hwy.

1nasty86

iTrader: (63)

car was street tuned with a wideband...

1nasty86

iTrader: (63)

between 2200-2500.. i cant really tell as the tach does not work but calculated on the internet it SHOULD be between 2200-2300

exodus_gs1

iTrader: (3)

Yea you should be getting decent mileage then. Idk man

ZQ8LS1

iTrader: (3)

My S10 with 5.3 4L60E & 3.43 gears gets 16 in town & 20ish on the hwy.

2500rpm at 80 mph.

Kingc8r

iTrader: (21)

I get between 14-17 depending on my pedal position lol

ZForce1

with my stock 2.73's I would consistently get 27.5 mpg on the highway. With 3.42 gears I could get 26 mpg if I kept rpm at or under 2000 rpm - no more than 70 mph. Above 70 mph gas mileage plummets quick. Stock engine, some tuning, airlid.

1nasty86

iTrader: (63)

so seems everyone even with mods is getting 17+ so i must have a problem somewhere.... guy i talked to said it was from the drag on my 315/35's that were at 18 psi but idk..

216StealthSS

18.5 avg mixed city and freeway. and my foot down too!