MPG
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MPG
Just bought an 08 SRW super cab long bed and wanted to know if my fuel economy was normal or if it indicates i might have a problem with the vehical's preformance. There is no tuner and the display indicates 11mpg around town, and 14mpg highway - no load. I towed a 5ooolbs trailer 2000miles and averaged 11mpg. I've validated the display by manually calculating the fuel usage during fillups and its seems acurate. Thanks for your observations!
Super Moderator
Joined: Aug 2008
Posts: 37,383
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From: Frederick, MD
You are in the ball park. Best thing to do is try to keep your rpms under 2K and stay off the boost.
Regens can also hurt and can possibly be an indicator of an issue. Normal regens can be different for everyone and the conditions they are driving in.
You can also look at your tailpipes for how clean they are to determine a possible issue.
Oil level can also assist in this issue as well. Growing oil levels could mean an overfueling problem.
Regens can also hurt and can possibly be an indicator of an issue. Normal regens can be different for everyone and the conditions they are driving in.
You can also look at your tailpipes for how clean they are to determine a possible issue.
Oil level can also assist in this issue as well. Growing oil levels could mean an overfueling problem.
Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
You don't say if it's a 250 or 350. if it's a 350 you may have a low rear axle. I don't know if they put 4.30s in SRW trucks or not but even a 4.10 will decrease your mileage a good bit over the 3.73. Either way your mileage doesn't sound much different than many others. Drive like an old lady and it will do a little better. Good luck.
Laughing Gas
Joined: Feb 2007
Posts: 950
Likes: 6
From: Waco, Texas
Ha, Ha, I love this line, and its so true!
Don't floor it from a stop, let it roll when you can. I have noticed the sweet spot on rpms, is about that 1875 to 1950 range. I don't worry about the speed, I just find the rpm range that it seems to go effortlessly. It just happens to be right at 70 mph. When pulling, that rpm is right at 1700.
Don't floor it from a stop, let it roll when you can. I have noticed the sweet spot on rpms, is about that 1875 to 1950 range. I don't worry about the speed, I just find the rpm range that it seems to go effortlessly. It just happens to be right at 70 mph. When pulling, that rpm is right at 1700.
Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
Ha, Ha, I love this line, and its so true!
Don't floor it from a stop, let it roll when you can. I have noticed the sweet spot on rpms, is about that 1875 to 1950 range. I don't worry about the speed, I just find the rpm range that it seems to go effortlessly. It just happens to be right at 70 mph. When pulling, that rpm is right at 1700.
Don't floor it from a stop, let it roll when you can. I have noticed the sweet spot on rpms, is about that 1875 to 1950 range. I don't worry about the speed, I just find the rpm range that it seems to go effortlessly. It just happens to be right at 70 mph. When pulling, that rpm is right at 1700.
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Thanks guys. I've checked and it a 3.73 rear, no exhaust build up and I'll keep an eye out for oil building. I never expected the fuel economy to be great but it seemed a bit low - guest not. Everyone I know with simular trucks all run programers so I was not able to get fair feed back on what was normal. I guess I'll have to learn that "sweet spot" and drive like grandma...nahhhhh.
While i have your attention...a few other questions about this truck maybe you have more quality advice regarding:
1. is there an easy way to turn off the chime for a disconnected seat belt?
2. is there an easy way to turn off the auto matic locking door feature?
Both are sooo anonying.
3. Why does my Ford have manual locking front hubs, when i have shift on the fly 4x4? Its the only truck I've ever owned set up this way. The hubs only offer "on" and "automatic" but it would reason to me that they should have an "off" position - is there some reason or advantage?
While i have your attention...a few other questions about this truck maybe you have more quality advice regarding:
1. is there an easy way to turn off the chime for a disconnected seat belt?
2. is there an easy way to turn off the auto matic locking door feature?
Both are sooo anonying.
3. Why does my Ford have manual locking front hubs, when i have shift on the fly 4x4? Its the only truck I've ever owned set up this way. The hubs only offer "on" and "automatic" but it would reason to me that they should have an "off" position - is there some reason or advantage?
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Super Moderator
Joined: Aug 2008
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From: Frederick, MD
Consult the owners manual for both the chime and auto locking doors. There is a procedure to do just that in the owners manual. One of the first things I did to mine.
The locking hubs is there as a backup system. Should you turn the switch and the hubs don't engage you can just lock them in yourself and still be able use the front wheels.
To ensure that your auto hubs work correctly and that those components stay lubricated it is a good idea to turn the hubs (not the switch) about once a month and drive the truck a few miles. It will mean your front end is turning but the transfer case is not engaged. This will lubricate the components.
The locking hubs is there as a backup system. Should you turn the switch and the hubs don't engage you can just lock them in yourself and still be able use the front wheels.
To ensure that your auto hubs work correctly and that those components stay lubricated it is a good idea to turn the hubs (not the switch) about once a month and drive the truck a few miles. It will mean your front end is turning but the transfer case is not engaged. This will lubricate the components.
Elder User
Joined: Dec 2009
Posts: 882
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From: Ohio
Just bought an 08 SRW super cab long bed and wanted to know if my fuel economy was normal or if it indicates i might have a problem with the vehical's preformance. There is no tuner and the display indicates 11mpg around town, and 14mpg highway - no load. I towed a 5ooolbs trailer 2000miles and averaged 11mpg. I've validated the display by manually calculating the fuel usage during fillups and its seems acurate. Thanks for your observations!
Best mileage I've ever got was 16.44 hand claculated. That was never exceeding 65 mph, no load except wife, dogs, and kids, with the truck in my sig. With the load above I'm pretty close to 10,000 lbs rolling with full fuel.
Spartan 210 tow tune, down pipe back straight exhaust, AFE Stage II SI intake, and a bed cover, factory tire size, and 4.30 gears. And driving like a Nancy.
I figure that's pretty darn good for a 10,000 lb pig but have no illusions that it takes very little change in terrain, weight, or rpm, to send that number south in a hurry.
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
my Spartan tuned truck showed 22-28mpg on the dash, and got 9-14 hand calculated.
| update - see you said all stock.. but never seen anyone do this.. even for manual trans
Sam
Postmaster
Joined: Nov 2006
Posts: 4,517
Likes: 3
From: SE Wyoming
I can make mine say over 30mpg on the gauge if I want. 11-14 is almost exactly what I get even drops to 9 pulling. 22mpg would mean I'd fill up every 800 miles and the smaller tank guys would do it in about 600 I doubt you are doing that.
Posting Guru
Joined: Jul 2005
Posts: 1,006
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From: San Jose, CA
I can make mine show over 90mpg. Just coast downhill and reset the meter.
Best I've gotten is 14.5mpg around town and 18 on straight shot freeway going 65mph.
That's a tad better than my F150 5.4 gasser, if not almost the same
When does winterized fuel normally start?
Best I've gotten is 14.5mpg around town and 18 on straight shot freeway going 65mph.
That's a tad better than my F150 5.4 gasser, if not almost the same
When does winterized fuel normally start?