back on the MPG thing
Postmaster
Joined: Oct 2005
Posts: 3,724
Likes: 0
From: Clarksburg WV
Can't set my cruise, the speedo jumps all over the place and hence so does my speed. I'm gonna try a new speed sensor in the rear and see if that fixes anything.
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
I know guy with 83 F250 with 6.9L 4 speed he got like 26.85 mpg.
Better mileage than average new passenger vehicle in 2.5ton commercial truck! - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com
Better mileage than average new passenger vehicle in 2.5ton commercial truck! - Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com
We've seen a 7.3IDI powered F150 get over 30 MPG. They call it the "nightmoose" over on OBN. Not much more than 3000lbs empty, 3.54 gears, non turbo, and ZF 5 speed. Cruise speed was 60-65 MPH and they did average several consecutive tanks.
I'm almost willing to bet the truck on ecomodder is not much more than 4000-4500lbs empty. Trucks in the 80s were pretty lean indeed. He should do that gear swap though. However I am impressed if he is including an urban driving cycle with his MPG results.
Postmaster
Joined: Jun 2008
Posts: 2,500
Likes: 2
From: Michigan
I get about 20 mpg goin 55 on flat land. With 2wd, 3.55s and the E4OD it does pretty good. Im gonna try setting my cruise at 50 and see how it does. It turns about 1500 rpm at 55, and about 1350(?) id say when going 50.
As for in the city..............we wont get into that.
As for in the city..............we wont get into that.
Senior User
Joined: Apr 2008
Posts: 448
Likes: 0
From: Iowa
!!!28 MPG? My 7.3 won't break 13 with 3.55s!
I think it's sold though- I want a truck with fewer problems.
A friend has a '89 2WD that regularly gets 18-20 MPG I want to buy when he sells it. I could get by without 4x4, I have 2 f150s.
I think it's sold though- I want a truck with fewer problems.
A friend has a '89 2WD that regularly gets 18-20 MPG I want to buy when he sells it. I could get by without 4x4, I have 2 f150s.
Fleet Owner
Joined: Jul 2006
Posts: 20,362
Likes: 823
From: Mi'kma'ki
i wounder if those who get poor mpg's (when empty at least) have never changed your injectors?
we can get some killer deals on brand new ones for our idi's.
remember they do get plugged up over time and stop spraying like they are supposed too.
its hard over time,to notice the power fade away and mpg's drop out of site.
but if you have 100k or more on a set of injectors,it can be worth replacing them long before you see symptoms of running really poor.-once they get this far gone,you have to change them.but keeping them fresh can make a huge difference in any motor.
just something to think about.
tuff times for a lot of people right now,so many cant just hop online and get a set.but the sooner you can,the sooner you can get your mpgs back up where their supposed to be and get that $ back and then some.
p.s. dont forget to check your timing!
a little fuel injector cleaner every few fill-ups can go a long way too.
dont forget to cut off that soup bowl under your air cleaner!-many reports of this being a huge gain! literally a hole mpg or more according to some! (remember even a .1 mpg increase add's up big over time. never underestimate a measly .1 mpg gain.every mod counts.
)
we can get some killer deals on brand new ones for our idi's.
remember they do get plugged up over time and stop spraying like they are supposed too.
its hard over time,to notice the power fade away and mpg's drop out of site.
but if you have 100k or more on a set of injectors,it can be worth replacing them long before you see symptoms of running really poor.-once they get this far gone,you have to change them.but keeping them fresh can make a huge difference in any motor.
just something to think about.
tuff times for a lot of people right now,so many cant just hop online and get a set.but the sooner you can,the sooner you can get your mpgs back up where their supposed to be and get that $ back and then some.
p.s. dont forget to check your timing!
a little fuel injector cleaner every few fill-ups can go a long way too.
dont forget to cut off that soup bowl under your air cleaner!-many reports of this being a huge gain! literally a hole mpg or more according to some! (remember even a .1 mpg increase add's up big over time. never underestimate a measly .1 mpg gain.every mod counts.
)
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Some people drive like they are old and have all the time in the world to get places.
Others drive like maniacs and only have 2 minutes to drive 20 miles.
Some people ar lucky and live in flat terrain at low altitude.
Others live up in the mountains where nothing is flat and the air is thinner.
Crew cab 4x4 or two wheel drive regular cab.
Add in fuel quality and blended fuel in colder climates to the above mix.
Combine the above conditions and you can see why MPG varies so much for trucks equipped exactly the same way.
Others drive like maniacs and only have 2 minutes to drive 20 miles.
Some people ar lucky and live in flat terrain at low altitude.
Others live up in the mountains where nothing is flat and the air is thinner.
Crew cab 4x4 or two wheel drive regular cab.
Add in fuel quality and blended fuel in colder climates to the above mix.
Combine the above conditions and you can see why MPG varies so much for trucks equipped exactly the same way.
Senior User
Joined: Apr 2008
Posts: 249
Likes: 0
From: above ground
like i was saying, i'm happy at the mpg's i get. my expedition regularly sees 11 mpg not towing. a round trip to san jose from sacramento was 17 mpg's @ an average speed of 82 mph on the gps. i'm sure iffn i didn't love to hear the 4" straight pipe sooooooooooo much the mpg's would be better.
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
pullinu,
Welcome to FTE and the IDI diesel forum.
From my experiments with propane I have to ask,
If you total up the propane cost and the diesel cost, is your cost per mile any better than a lower MPG and running straight diesel?
I also got some huge increase in MPG whe I ran enough propane, but when I figured in the cost of both the diesel and the propane, I was right back where I started running just diesel.
Welcome to FTE and the IDI diesel forum.
From my experiments with propane I have to ask,
If you total up the propane cost and the diesel cost, is your cost per mile any better than a lower MPG and running straight diesel?
I also got some huge increase in MPG whe I ran enough propane, but when I figured in the cost of both the diesel and the propane, I was right back where I started running just diesel.
Senior User
Joined: Apr 2008
Posts: 448
Likes: 0
From: Iowa
Friday I went on a 100 mile round trip on a rainy / windy night and driving like an old lady- 55-57 MPH and shifting at 17-1800 accelerating I got 13.8 MPG
It's not horrible, but not that good either. It's still better than my 300 six on fuel though
It's not horrible, but not that good either. It's still better than my 300 six on fuel though
Senior User
Joined: Apr 2008
Posts: 249
Likes: 0
From: above ground
that sucks, that is what i get while towing my rock crawler. and i have 38.5" tiers with stock gears(the milage is gps confirmed).