Fuel economy
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TECH Fanatic
Joined: Feb 2006
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From: CT/NJ
Fuel economy I'm getting 21-22 MPG average with my '93 A4 3.23. I have been using the car to commute 140 miles round trip daily for 2 months now. Until I get a place closer to my new job, I am stuck with this commute and using the LT1 for it (my other vehicle is a '97 K3500 with a 454 and 4.10 gears, 9 MPG highway).
What are you guys getting for highway fuel economy? Anyone find good ways to improve f-body fuel economy aside from taking it easy on the gas pedal or changing engines or gear ratios?
What are you guys getting for highway fuel economy? Anyone find good ways to improve f-body fuel economy aside from taking it easy on the gas pedal or changing engines or gear ratios?
Is that straight highway mpg's or a mix?
I get 19-20mpg highway if I baby my car with 3.73's and ~400rwhp. Around town or with a mix of town/highway that is a whole nother story because the 4000 stall pretty much murders it.
A tune may help you out a little but nothing real significant. Weight reduction would help out a little as well.
I get 19-20mpg highway if I baby my car with 3.73's and ~400rwhp. Around town or with a mix of town/highway that is a whole nother story because the 4000 stall pretty much murders it.
A tune may help you out a little but nothing real significant. Weight reduction would help out a little as well.
Anywhere from 15-30 mpg 
the 30 mpg was on a cross country trip though.
I also did once "hypermile" the car, rural/suburban driving and got 26 mpg. That was definitely repeatable because I did the same trips with my lt1 caprice (automatic/heavier) and got 23 mpg.
the 30 mpg was on a cross country trip though.I also did once "hypermile" the car, rural/suburban driving and got 26 mpg. That was definitely repeatable because I did the same trips with my lt1 caprice (automatic/heavier) and got 23 mpg.
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Before i put on DR's i was getting 26mpg
You'll improve fuel economy by driving slow (speeds below 55mph).
Clean air filter, fuel filter, and injector cleaning might help some too. I got the best mpg by running tires at 32psi
You'll improve fuel economy by driving slow (speeds below 55mph).
Clean air filter, fuel filter, and injector cleaning might help some too. I got the best mpg by running tires at 32psi
Last edited by LT1; Sep 14, 2010 at 04:27 PM.
I would rotate the tires, change air/fuel filter, new plugs, and do a good once over on everthing that could effect MPG's. Could the brakes be sticking? Do you have a PCM tune?
I think you can improve it some (24mpg) but it will never be like a 4cyl civic/accord tho. My accord (4cyl) gets 36mpg doing 70mph.
I think you can improve it some (24mpg) but it will never be like a 4cyl civic/accord tho. My accord (4cyl) gets 36mpg doing 70mph.
Staging Lane
Joined: Jul 2010
Posts: 66
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From: Elizabethtown, KY
95 A4, LT1, 2200ish stall, and 3.23s, and I get about what you are looking for 20-23mpg. I drive mine 120 miles daily, though I don't get stuck in much stop and go traffic. If I could keep my foot out of it on the back roads, I'd probably get closer to 25.
Rockstar
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From: I'm on a boat! in Shreveport, La
I was getting 20 bone stock with 2.73's. With 4.10's I was getting 15 or less.
Once I finish my rebuild with a 4000 stall and bigger cam I'll be lucky if I get 10.
Once I finish my rebuild with a 4000 stall and bigger cam I'll be lucky if I get 10.
I got 30 mpg averaging over 70.
For the M6 car's 55mph would be too slow, since you dont want it to lug.
For the A4's i think the 55-65mph would be better.
With my M6 rear gears (3.42's) i was getting 1,700rpm@70mph in 6th gear.
Thread Starter
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Joined: Feb 2006
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From: CT/NJ
97% of my drive is highway and I have been setting cruise control at 65 (the speed limit) I have found anything much below 60 in overdrive lugs the engine, especially on hills. Maintenance is up to date (plugs, wires, fuel + air filters, new opti, new coil, tires at 35 psi).
I am about due for new front brakes (pads and rotors are worn out). Would a low drag "race" brake setup like the Strange setup provide a significant improvement and still be streetable?
I am also considering a new set of rims. Anything to look for besides lightest weight for the best fuel economy?
I am about due for new front brakes (pads and rotors are worn out). Would a low drag "race" brake setup like the Strange setup provide a significant improvement and still be streetable?
I am also considering a new set of rims. Anything to look for besides lightest weight for the best fuel economy?
I used to get 26-28 on the highway with my stock motor. Or around 350+ a tank. I think the worst I ever had in the city was 120 miles to a tank.
My old 388ci only got around 250 highway and 140 city.
My new 396ci I don't even know.
My old 388ci only got around 250 highway and 140 city.
My new 396ci I don't even know.
1200 easy. How cheaply you can get the trans, pigtails, and pedals is going to be the main hurdle. Then whatever clutch you want to get. The center console is also hard to find on the cheap in good condition.