What are some possible miles per gallon numbers that you can get with a rebuilt '84 Duke with mild upgraded hardware, stock V6 exhaust, and auto transmission?

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Matthew "Whyt Nyte" D.
84 SE- automatic, rare Fender Delete option "Fender gap? What fender gap?"

"Damned '84 econo coupes! Why didn't you guys tell me this BEFORE I bought the dang thing!"

My wifes 87 coupe, 5 speed, Is getting 33 mpg. She drives 80 miles round trip to work each day mostly interstate. The car is dead stock pulling AC.

my 86 5 speed got 28 MPG and my 84 (slush) currently gets 25 I drive 60 miles a day mostly highway

[This message has been edited by 84Bill (edited 05-07-2001).]

I get 19 to 21mpg stop and go to work, depending onhow much I hot rod it. The trip to Paxton and home gave me 26+mpg with a long strech of driving at 70mph,75-80mph and I did get to 95mph for about 15 minutes.Please do not tell my insureance company or my wife!

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Peace and Happiness
Frank and his fotoflash, an '84 SE 2M4
http://www.homestead.com/fotofrank/foto1.html

Doug delivered my Indy down here to me a couple of weeks ago from WV and was reporting getting mid 30s on the interstate. I just drove my 88 T-top to VA and back and averaged about 37, with the T-tops out! This, of course, is interstate with lots of drafting behind semis. But I love passing those gas stations!

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Tennessee Fiero Owners

I get about 26 city and 35-36 highway.

This on a 2m4 automatic with air and 195 70R14 tires.

quote Originally posted by Songman: Doug delivered my Indy down here to me a couple of weeks ago from WV and was reporting getting mid 30s on the interstate. I just drove my 88 T-top to VA and back and averaged about 37, with the T-tops out! This, of course, is interstate with lots of drafting behind semis. But I love passing those gas stations!

Great googly moogly 37! semis are good drafterd but the turbulence get to be a bit much after a while

The best I ever got with my 87 coupe with an automatic was 22 MPG when it was working right and that was mostly 70-75 mph highway after I just gave it a major tun-up including a new 02 sensor. My worst was 19.5 MPG with the coupe. The best I ever got with my 5-speed formula driving the same speed was 30 mpg and it needed a tun-up. The worst I got with my formula was 24 mpg. My brother had a 91 Grand am with the 2.5-liter motor and he never got better than 23 highway MPG. I could pass him in a race in my old v6 Bonneville and get 23 MPG in mixed driving. For some reason I could never get good mileage with the 2.5-liter engine and I always keep my cars in tune. The 30-mpg I got with my formula was driving it home from Connecticut the day I bought it, must be the 5-speed. I then gave it a tun-up.

A freer flowing exhaust system will improve your gas mileage.

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My 85 5 speed gets about 23 city, and around 30-31 highway. Needs rings, or valve stem seals.

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85 2M4(Lil' Bit)