I just recently finished about a 300 mile run down I-95
Where just to keep up with the traffic one has to stay just slightly above 80 MPH, even with getting on it a few times, fastest about 135, I managed 23.5 miles to the gallon.
When I first got the car I was getting an average of 14-14.5 mpg. After I gave her a tune up I got, and still get 16 mpg. That's around town and the commute to work on the highway about 10 miles. I can't complain about 16 mpg at all. It sounds funny, but that is way better gas economy over my last vehicle. (I had a jeep wrangler lifted up on 35's thornbirds!) In the jeep I got 10 mpg!:L
the 89 roadser bonestock 6speed has gotten as good as 30 MPG highway
The 89 coupe with a beefed up 383 6speed has gotten 23+ MPG highway
both at arond 70 MPH using 6th gear
No complaints here!
AI head/cam/intake, Vig converter, D44, EM LTs etc
Around town when gas was above 3 bucks = 17-18 MPG. When gas prices are under $2.50 TWELVE MPG:L
On road trips if I keep it below 90 26-30 MPG. My car is pretty efficient if I can keep my right foot off of the floor.
My around town milage has gotten better since my 2.59-3.45 rear end swap; however, I lost a little highway milage.
Mike
funny but before i blew out my fuel return line my avarage was around 18.5 or so. now the last couple of days after the return line was blown out its up at 20.4 now!! man who knew some thing so simple could change so much!! shes idleing smoother, idles down fast which helping gas i am sure?
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