Post your gas mileage!
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Junior User
Joined: Jun 2007
Posts: 99
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From: Tampa, FL
Post your gas mileage!
I know a majority don't calculate it, but for those who do, please post it up.
I am looking at going to a '77 with the 351m w/ the 4 speed manual and am interested to see what i could possibly get out of it, and to see what people with other setups are averaging.
My current truck is a 77 f150 with the 300 straight six and 3 speed auto, and i average 12 mpg 50/50.
I am looking at going to a '77 with the 351m w/ the 4 speed manual and am interested to see what i could possibly get out of it, and to see what people with other setups are averaging.
My current truck is a 77 f150 with the 300 straight six and 3 speed auto, and i average 12 mpg 50/50.
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Junior User
Joined: Jun 2007
Posts: 99
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From: Tampa, FL
Originally Posted by masterbeavis
Ugh, another gas mileage post 
Anyways, the small block rigs I have get around 10, anything bigger than a 351, 7-9 mpg
Anyways, the small block rigs I have get around 10, anything bigger than a 351, 7-9 mpg
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Joined: Oct 2005
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I don't do any extended around town driving so I don't know just how bad the city mpg is but as for hwy I can squeeze 12 out of both trucks provided I keep it at 55 mph. Any speed over that and the milage plummets.
79 F350 chassis cab w/ flat bed 400 4 sp 3.73
79 F250 4x4 400 4 sp 4.10
79 F350 chassis cab w/ flat bed 400 4 sp 3.73
79 F250 4x4 400 4 sp 4.10
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Joined: Mar 2002
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From: Colstrip, MT
'78 F-150. Stock 400, newly rebuilt.
In town - 10
Out of town - 10
Hauling aerostar van on car hauler - 10
Downhill with 20 mph tailwind - 12
Idling for an hour, waiting for cab to warm up - 0
Hauling camp trailer to the mountains - somewhere between 0 and 7
In town - 10
Out of town - 10
Hauling aerostar van on car hauler - 10
Downhill with 20 mph tailwind - 12
Idling for an hour, waiting for cab to warm up - 0
Hauling camp trailer to the mountains - somewhere between 0 and 7
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From: Northeast Nebraska
78 F-250 SuperCab 4x4 4.10 gears, 30" (actual diameter) tires, auto. I have a freshened up 400 with a 2bbl, stock exhaust and Comp Cams XE256 cam, straight up timing and new lifters. I just got it on the road last weekend and I got about 150 miles out of the first tank all highway 60-65...thats about 7.5 mpg OUCH! She runs 3000 rpm at 62 mph. I need to mess with it some more to see if I cant squeeze out at least 10 mpg. Im thinkin maybe some better flowing exhaust and better carburation.
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Post Fiend
Joined: Jan 2003
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From: Montana Territory
13 around town, 15 on the highway... 79 F150 400/C6 2.75 rear, 255/70/16 tires.
Thats pretty average, if it gets cold here they switch the fuel and I lose 1-1.5 mpg.
I think the best thing was switching out my old 351M and not losing any mileage, like everyone said I would...
Thats pretty average, if it gets cold here they switch the fuel and I lose 1-1.5 mpg.
I think the best thing was switching out my old 351M and not losing any mileage, like everyone said I would...
