View Poll Results: What's your Approximate average gas mileage with your 4.6/5.4?
19 or more 
2
1.32%
18 MPG
4
2.65%
17 MPG
5
3.31%
16 MPG
11
7.28%
15 MPG
24
15.89%
14 MPG
38
25.17%
13 MPG
31
20.53%
12 MPG
24
15.89%
11 MPG
7
4.64%
Less than 10MPG 
5
3.31%
Voters: 151. You may not vote on this poll
Ultimate MPG Poll
Thread Starter
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Postmaster
Joined: May 2002
Posts: 3,028
Likes: 1
From: Annapolis, Maryland
Ultimate MPG Poll
Let's settle it - or lie about it. Your choice 
I average about 14 with new plugs/air filter.
If you're in between, then just round to the nearest whole number.
XXL
I average about 14 with new plugs/air filter.
If you're in between, then just round to the nearest whole number.
XXL
Last edited by BigMattXXL; Dec 8, 2003 at 09:24 PM.
Junior User
Joined: Feb 2003
Posts: 71
Likes: 0
From: Oconomowoc, WI
What's really going to make the difference is the amount of stop and go driving you do. Getting these big trucks moving sucks the gas. I get over 17 on straight highway driving and it can drop to 12 around town, especially if I put your foot in it.
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Postmaster
Joined: May 2002
Posts: 3,028
Likes: 1
From: Annapolis, Maryland
Originally posted by myblkexpy
What's really going to make the difference is the amount of stop and go driving you do. Getting these big trucks moving sucks the gas. I get over 17 on straight highway driving and it can drop to 12 around town, especially if I put your foot in it.
What's really going to make the difference is the amount of stop and go driving you do. Getting these big trucks moving sucks the gas. I get over 17 on straight highway driving and it can drop to 12 around town, especially if I put your foot in it.
XXL
Senior User
Joined: Apr 2002
Posts: 197
Likes: 0
From: in a house
This one time, at Band camp - oh wait, different story.
Pulling a trailer on a trip from Minneapolis to Kentucky (Bowling Green) I decided to make good time (averaged 70mph) and averaged......
7.9 MPG!
My 78 F350 dually 4x4 460 gets better gas mileage pulling a trailer!
Pulling a trailer on a trip from Minneapolis to Kentucky (Bowling Green) I decided to make good time (averaged 70mph) and averaged......
7.9 MPG!
My 78 F350 dually 4x4 460 gets better gas mileage pulling a trailer!
Senior User
Joined: Aug 2003
Posts: 180
Likes: 0
From: MA
At the very least, seeing the early poll results makes me feel a *bit* less bad about the 12.2 that I'm getting consistantly. C'mon, I didn't buy my Expy thinking it was a Toyota hibrid... 12.2 will do just fine considering how much fun it was driving through the 20+ inches of snow here in Boston!
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Postmaster
Joined: May 2002
Posts: 3,028
Likes: 1
From: Annapolis, Maryland
Ok, fess up - who's the joker who's getting 19+ MPG average? Unless you drive 100% on the highway, I'd like to know the details 
XXL
XXL
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Joined: Dec 2003
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Took a trip to Seminole, Okla. to visit the folks for Thanksgiving... For the 1800 miles round trip, I averaged 15.03 mpg, using the same gas pump and position to fill up at the beginning and end. I drove a solid 80 mph when possible, (85% of the time) on the round trip from my home in Palmer Lake, Colorado. Mr. 19 mpg, I am not worthy!
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Joined: Sep 2002
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From: North Carolina
97 5.4 4X4 with 3.73 gearing, I got a solid 17 MPG on a 1500 mile trip from NC to MA. Average speed was between 70-75. around town mixed driving I average 13. That is the best I can pull out! I have played with speed and RPM changes. I do notice that if you keep the RPM's below 2300 you will get better fuel mileage than if your over 2300. It starts dropping pretty quick at higher RPM's. I also notice that when pulling a grade you will drop down to 6-7 MPG.
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Joined: Dec 2003
Posts: 22
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Good job on the 17 mpg. I have seen 17 mpg on two lane highways driving 60-65 mph. I live at 7300 ft of elevation, and the power is down, but I know I have less wind resistance up here and that seems to balance it out at higher speeds. I don't know what gearing I have, It's a 2000 EB, 4awd, 5.4 of course, K&N air filter and factory tow. I turn about 2,000 rpm at 70 mph, 2,300 rpm at 80 or so. I don't normally push it like this last trip to Oklahoma, it just makes the day shorter if you can make some time on longer trips. I also found a leaky rear axle seal on the left side after the trip. Could be the higher speeds? Can a change of rear fluid help to revitalize those seals or am I doomed to replace it?
-Howard.
-Howard.
Freshman User
Joined: Sep 2003
Posts: 35
Likes: 0
Check your tire pressures people. Tire pressure plays a big role in the amount of MPG you get.
Here's a little trick that taxi cabs do. Most taxi cabs (if not all) purposely run their tires at less than optimal tire pressure. Why? Less pressure decreases the total diameter of the tire (making it smaller). Therefore, 1 mile on a properly inflated tire will be more like 1.2 or 1.3 on a deflated tire. Yeah, the taxi isn't getting the greatest in gas mileage, but they're making it up in the fare.
In Las Vegas, tire pressure is usually normal since these guys charge by time, not distance.
Here's a little trick that taxi cabs do. Most taxi cabs (if not all) purposely run their tires at less than optimal tire pressure. Why? Less pressure decreases the total diameter of the tire (making it smaller). Therefore, 1 mile on a properly inflated tire will be more like 1.2 or 1.3 on a deflated tire. Yeah, the taxi isn't getting the greatest in gas mileage, but they're making it up in the fare.
In Las Vegas, tire pressure is usually normal since these guys charge by time, not distance.