MPG and setups?
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Lead Driver
Joined: Mar 2008
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From: Near Los Angeles
MPG and setups?
I thought it would be interesting to everyone to hear what others are getting for mpg.
Tell us you vehicle, year, rear gears, trans, engine mods, if any, tire size, and the mpg you currently get.
Thanks.
I'll start. I have a '75 F350, labeled a F250. The rear gears are 3.31's, with a C6, stock tires, and you can see my mods in my sig. When I first built the engine, I had an autolite 4100 on it, and took 500 mile trip. 90% of the trip was freeway, with 100 miles through winding hills. I averaged 16 mpg.
Tell us you vehicle, year, rear gears, trans, engine mods, if any, tire size, and the mpg you currently get.
Thanks.
I'll start. I have a '75 F350, labeled a F250. The rear gears are 3.31's, with a C6, stock tires, and you can see my mods in my sig. When I first built the engine, I had an autolite 4100 on it, and took 500 mile trip. 90% of the trip was freeway, with 100 miles through winding hills. I averaged 16 mpg.
FTE Chapter Leader
Joined: May 2009
Posts: 8,843
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From: Eastern Ky
1992 F-150, I-6/ M5OD, 3.08 gears, and 235/75/15 tires.....
Only thing aside from a REALLY good tuneup, is the cold air kit...It's funneled from the bumper, up to the intake.....
Also, have a lighter hood.....
153 miles, used 9.4 gallons....Got a lil over 16mpg....At about a 60% City, 40% highway mix....
Only thing aside from a REALLY good tuneup, is the cold air kit...It's funneled from the bumper, up to the intake.....
Also, have a lighter hood.....
153 miles, used 9.4 gallons....Got a lil over 16mpg....At about a 60% City, 40% highway mix....
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Lead Driver
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1979 crew totally stock engine, 4 spd, 3.55s and 33s. I get about 12-15 estimated. I live at almost exactly 50 miles from work, so I know that, but my speedo broke, so I can't get true numbers.
On my 74 I had an Isky cam, offy intake, Autolite 2150 carb, split headers with dual 2.5" exhaust, 4 spd, 4.10s and 36s and it would get a GPS'd 14MPG.
On my 74 I had an Isky cam, offy intake, Autolite 2150 carb, split headers with dual 2.5" exhaust, 4 spd, 4.10s and 36s and it would get a GPS'd 14MPG.
Posting Guru
Joined: May 2007
Posts: 1,208
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From: North Reading Mass
95 F150 SC SB 4x2 300, 5 speed 3.08s stock tires.
16.6 to 17.5 MPG average on my commute into Downtown Boston. I check it every fillup. On the highway I get about 18.5 to 19 @ 70 with a best of 20 @ 60 mph. Hauling a 4100lb rv it drops to 13 @ 55 on the back roads.
After market spirial core wires, 12 deg BTDC, plugs gapped at .050,5th wheel air gate and a dash mounted vacuum gauge.
YMMV
regards
rikard
16.6 to 17.5 MPG average on my commute into Downtown Boston. I check it every fillup. On the highway I get about 18.5 to 19 @ 70 with a best of 20 @ 60 mph. Hauling a 4100lb rv it drops to 13 @ 55 on the back roads.
After market spirial core wires, 12 deg BTDC, plugs gapped at .050,5th wheel air gate and a dash mounted vacuum gauge.
YMMV
regards
rikard
FTE Chapter Leader
Joined: May 2009
Posts: 8,843
Likes: 27
From: Eastern Ky
95 F150 SC SB 4x2 300, 5 speed 3.08s stock tires.
16.6 to 17.5 MPG average on my commute into Downtown Boston. I check it every fillup. On the highway I get about 18.5 to 19 @ 70 with a best of 20 @ 60 mph. Hauling a 4100lb rv it drops to 13 @ 55 on the back roads.
After market spirial core wires, 12 deg BTDC, plugs gapped at .050,5th wheel air gate and a dash mounted vacuum gauge.
YMMV
regards
rikard
16.6 to 17.5 MPG average on my commute into Downtown Boston. I check it every fillup. On the highway I get about 18.5 to 19 @ 70 with a best of 20 @ 60 mph. Hauling a 4100lb rv it drops to 13 @ 55 on the back roads.
After market spirial core wires, 12 deg BTDC, plugs gapped at .050,5th wheel air gate and a dash mounted vacuum gauge.
YMMV
regards
rikard
Postmaster
Joined: Dec 2006
Posts: 3,603
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From: Spokane, WA
Cheating? Cheating?? No way!!! Cold starts and short trips in town including a 10.5 mile commute to a part-time job. Here is how it's done: When the temps drop into the 20s overnight I plug in the block heater. When starting in the morning it gets minimal warm-up time...just enough for the needle on the oil gauge to hit it's normal spot. Take off and drive at rpm no higher than 1200-1500 (about the same as a fast idle).
Trips: Hold to maximum 62 mph. If pushed to 70 mph or more mpg drops at least 1-1 1/2 mpg.
Keep tires inflated to maximum load rated pressure...weekly pressure checks especially in the winter. Use synthetic gear oils in the transmission and differential. I just switched to full synthetic in the engine...10w-30 from 5w-30 conventional oil. I'll probably switch back to lighter oil for winter. Install a vacuum gauge in-cab. When at all possible do not push the pressure drop to less than 10 hg or at least stay above the power valve opening point.
Now if any or all of that is cheating...I'm a happy cheater!
Trips: Hold to maximum 62 mph. If pushed to 70 mph or more mpg drops at least 1-1 1/2 mpg.
Keep tires inflated to maximum load rated pressure...weekly pressure checks especially in the winter. Use synthetic gear oils in the transmission and differential. I just switched to full synthetic in the engine...10w-30 from 5w-30 conventional oil. I'll probably switch back to lighter oil for winter. Install a vacuum gauge in-cab. When at all possible do not push the pressure drop to less than 10 hg or at least stay above the power valve opening point.
Now if any or all of that is cheating...I'm a happy cheater!
Lead Driver
Joined: Jul 2009
Posts: 6,477
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From: Sheffield, AL
1986 F150; duraspark conversion; 215/75 tires; SROD transmission; 147,087 miles; driven like an old man 
98+% urban driving [12 mile commute @ 45 mph max with more than a few stop signs and traffic lights].
Most recent MPG fill-ups [mild to warm temperatures]: 16.77, 17.43, 16.33, 16.92, 16.33, 16.78 & 17.55
In the past, I have a couple of highway jaunts and @ ~55 mph, it returned over 20 MPG, possible even 22+ on one leg.
98+% urban driving [12 mile commute @ 45 mph max with more than a few stop signs and traffic lights].
Most recent MPG fill-ups [mild to warm temperatures]: 16.77, 17.43, 16.33, 16.92, 16.33, 16.78 & 17.55
In the past, I have a couple of highway jaunts and @ ~55 mph, it returned over 20 MPG, possible even 22+ on one leg.
Junior User
Joined: Jan 2009
Posts: 69
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From: S. ILL.
95 F-150: 4.9, 5-speed Mazda, 2.73 gearing.
3 full tank checks since I've got it.
#1 15.5 using 4th gear only
#2 17.5
#3 17.3
AVG. 16.76
Completely stock & I don't know when it had it's last tune up.
JIM.
3 full tank checks since I've got it.
#1 15.5 using 4th gear only
#2 17.5
#3 17.3
AVG. 16.76
Completely stock & I don't know when it had it's last tune up.
JIM.