Im getting around 17 in the city, dont know about the highway. Its my DD with 137k and climbing

 

towing it doesn't count


I get 16mpg daily driving and 26 to 28 freeway. San Francisco to Reno and back on 16 gallons but of course comming back is all down hill.

 

17.3 Highway with the T-tops out and the windows down. The car weighed about 3900 lbs with a full tank of gas, with me, and 2 other people.

~126,000 miles on motor

Mods in sig

 

I get 16 in city, 20 highway...Not too shabby if you ask me...

--Alan

 

19mph on highway. Not sure what in town driving is like since I never take it anywhere. I would guess 12 to 15...
That's because you can't get your turd pile to drive any farther than that.

 

15 MPG 80% hwy driving.

 

are you sure? I would think the LT1 would have better mpg's cause peak tq hits so early so you shouldn't have to rev it as high when just puttin' around

 

i get 12mpg with my mods driving really easy.. i can figure out how you guys get such good mpg.. maybe i should fix the exhaust leak from the exhaust manifolds then recheck

 

ditch the manifolds for some headers, ditch the chokemaster exhaust, and ditch the 58mm TB edit:woops sorry thought I read 58mm in your sig!

 

Getting 13 around town, 18 on the highway, unless i am beating it

 

So the key is using stock heads/cam. Other than the lucky ones with cam only I guess.

 

My '97 is an M-6, bone stock. Gets 17 town and 28-29 hwy (running ac).

 

I know my car isn't a Camaro but my '72 Vega with a '93 LT1/M29 T56/12 bolt 3.31 posi averages 19 mixed mileage. That was with points ignition, an out-of-tune Edelbrock 1406, what appears to be a pretty nasty vacuum leak, and no hood or front valance. My engine has zero accessories on it other than an alternator. No power steering or air conditioning. I'm hoping with the fuel injection, a tune, the hood on and the front valance reinstalled to be in the area of 25 miles per gallon highway. I mean, it shouldn't be a problem. My car only weighs 2500 pounds.

 

Best I ever got was going to Memphis 97, 28mpg doing about 75mph. Mods at the time were 4.10 gears, 1LE driveshaft, K&N, and 160 t-stat. I did have a HPP+ but only to correct the speedo. Used to average 21-22mpg in mixed driving.

Its about 20mpg average with the crap gas we have now. HOT cam, SLP dual cat headers, Borla/SLP cat back, 1.6 rockers, and above mods. I did manage about 25mpg a couple years ago coming from VA to MS. That was before ethanol though.

 

This debate will be the deciding factor whether I go 383 or not. I have heard some get 25mpg highway. If that's so would be nice to know the combo they used as that's GREAT.

I'm sure I could build a 355 LE1 and get 25+ but who knows.