Gas mileage

[Alan76]

What is your average gas mileage Mine is about 14 mpg

 

[woobie1966]

im getting roughly 12 mpg, but that is almost exclusively city

 

[MaineShark]

16.4mpg... combination of city and highway. And that's with my foot in the carb half the time.

I was only getting 15 or so, until I properly tuned it up. Now I have more power and better gas mileage. Win-win

Joe

 

[78SilvAnniv]

Almost 20!

I was averaging about 19...until I had the chambered exhaust installed. Now I can't keep my foot out of it (I love to hear it roar!) and my mpg suffers. I imagine I probably get about 14-16mpg now.
Heidi

 

[Tom73]

Took the 73 L82 auto on a 2K mile trip, averaged 12.9. Took the 73 LS4 4-speed on the same route and averaged 13.0 mpg. Same trip with my 90 L98 auto got 27 mpg

tom...

 

[Nut]

I actually managed 23.3 once on a long leg to upstate NY. On a recent trip to Atlanta I got 21.1. Just tooling around the neighborhood... maybe 15-16mpg. It's not a bad deal as long as like Heidi said...... if I can keep my foot out of it.

............... Nut

 

[red70vette]

I usually get 14-16MPG combo of city and highway driving. Suprises me since I have a somewhat heavy foot.

 

[mapman]

Gas milage? 29.4 mpg highway, and about 24 mpg overall.

(2003 convertible with automatic - sorry I couldn't resist. These C5s just don't look like economy cars.)

My 1980 L48 on the other hand ......

 

[Rich80]

15 MPG average...:cool

 

[Rich80]

15 MPG average...:cool

 

[True Duals]

16.4mpg... combination of city and highway. And that's with my foot in the carb half the time.

I was only getting 15 or so, until I properly tuned it up. Now I have more power and better gas mileage. Win-win

Joe

I'm happy to see 12mpg

 

[lucky76]

Fill it up

I'm happy to see 12mpg

I don't care, I just fill it up when it's nearly empty!
Why would you care in an old car what gas mileage you get anyway
unless it's the only car you have.

 

[Stallion]

16.4mpg... combination of city and highway. And that's with my foot in the carb half the time.

I was only getting 15 or so, until I properly tuned it up. Now I have more power and better gas mileage. Win-win

Joe

What kind of tune-up did you do to get these benefits? Timing? New plugs? New wires? What exactly did you do?

 

[curtis]

Average about 16 mpg at 75 plus in the 3300rpm range, but who really cares as long you can go for a pack of smokes on less than a tank. Don't you just love the opening of a new bridge so you can be the first to stripe it.

 

[Glensgages]

My '82 got 23+ (highway) with the OEM 2.87 gears:
with 3.73s, it has gotten 17+ in 'mixed' driving conditions.

My '79 Z28 takes more than a gallon per 1/4-mile sprint.....

 

[Dean Barker]

The drivers information center says that I'm getting right at 25 over the last 3-4000 miles. LT4 6 speed coupe, all stock, very little town driving but going 80 in Nebraska and South Dakota, 75 in Minnesota, and 70 in Iowa.

 

[waterboy1976]

11 mpg on my "slightly" modified 73....

 

[Stallion]

I would like to go to FI for the power and the mpg but I don't really go for the complexity of the system, and I do like the carburetor look and feel. Kind of a tough choice...

 

[MaineShark]

What kind of tune-up did you do to get these benefits? Timing? New plugs? New wires? What exactly did you do?

I had it at John's Corvette Service having the window regulator replaced, and asked him to check over the carb and timing at the same time. I think all he found that needed fixing was the vacuum advance on the distributor, but it was like a whole different car, afterward!

Joe