View Poll Results: MPGs in your Ford
25+
0
0%
Voters: 34. You may not vote on this poll
MPG Poll
Cargo Master
Joined: Aug 2007
Posts: 2,561
Likes: 69
From: New Zealand
Well I thought I was getting 16.5mpg, but after checking with a GPS against my speedo found it's 15.8mpg (empty) - F250 2wd, stock 351W & AOD, 3.54, all @ 55mph on 235/85-16's.........never use OD due to combination of speed limit / axle ratio / hills.
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
12-16 MPG according to the odometer. The speedo is a bit slow, as the truck originally had 215/75-15 rear tires, and now has 31x10.50-15 on the back. The lower figure is when towing, and the higher is running empty. It did a little better before the taller tires were added.
300, C6, 2.75 rear gears (soon to be replaced with 3.25) and I rarely exceed 65 MPH (under 2,000 RPM).
Of course, trying to get in a hurry can drop the MPG to well into the single digits, but you won't go any faster.......
300, C6, 2.75 rear gears (soon to be replaced with 3.25) and I rarely exceed 65 MPH (under 2,000 RPM).
Of course, trying to get in a hurry can drop the MPG to well into the single digits, but you won't go any faster.......
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
11.5 - 12 mpg running between 60 & 65. 351W with DSII conversion, 2150 carb, AIR & EGR removed, and a Comp Cams 252H installed. Tires are 215/75/R15 at present, but going to 235's soon. Diff is 3.55 and tranny is C6. Running 6 BTDC at present, but will be bumping it up a bit and am considering an adjustable vacuum advance.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
Use the narrower slot of the plate up (10-L?) if you have one, or bush the limit pin to keep your centrifugal advance around 20.
Depending on compression and fuel you might have an initial advance of 12* +20 or so centrifugal + the additional vacuum advance, if hooked to the timed vacuum port coming from above the throttle plate.
http://www.cranecams.com/uploads/instructions/271e.pdf
Duraspark_distributor_recurve_instructions_index
Cargo Master
Joined: Oct 2005
Posts: 2,303
Likes: 29
From: NJ
Poll is flawed. Should have wider ranged down low, then tighter as numbers increase. 5-10 MPG is no big deal, most will fall in 10-15, and some higher. As you get into low-mid teens every MPG is a big increase so more significant of a change.
Ina ny event, here's mine...
'86 Supercab F-250, Dana 60 swap up front, 460 swap (around 400 HP), ZF5, 3.55:1, 4" lift, 35" tires, 6000 lbs as it sits. 12.5 MPG highway at 70 MPH and 10 MPG towing about 4500 lbs at 65 MPH.
For extra info, bone stock 351w/C6 no lift, stock tires, 3.55:1 it got ~17 MPG at 75 MPH.
Ina ny event, here's mine...
'86 Supercab F-250, Dana 60 swap up front, 460 swap (around 400 HP), ZF5, 3.55:1, 4" lift, 35" tires, 6000 lbs as it sits. 12.5 MPG highway at 70 MPH and 10 MPG towing about 4500 lbs at 65 MPH.
For extra info, bone stock 351w/C6 no lift, stock tires, 3.55:1 it got ~17 MPG at 75 MPH.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
jjurva
1973 - 1979 F-100 & Larger F-Series Trucks
44
Jan 2, 2012 01:33 PM
