MPG issue maybe?
Thread Starter
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Mountain Pass
Joined: Aug 2012
Posts: 249
Likes: 0
From: Boise, Idaho
MPG issue maybe?
I know not to expect much for MPG is these trucks, just want to get a feel for what I should get towing..
I usually get 11 to 12 around town and up to 15 on the highway. My old toy hauler weighed about 5,000 lbs and I was getting around 10 or 9 depending on where I was going.
Got a new toy hauler and it weighs 7,000 to 7,5000 dry. Havnt put water in it yet, just a 10 gallon jug of water and two dirt bikes with some gas cans. I am getting 7.4 MPG. I went 170 miles and the fuel light came on.
Is this to be expected? It is stock excpet for the 4" turbo back and the bullydog intake.. (I know I should use the stock one)
Any thoughts. No codes on the SGII. oil and water temp stay within 15 degrees. But its pushing it.
Thanks,
I usually get 11 to 12 around town and up to 15 on the highway. My old toy hauler weighed about 5,000 lbs and I was getting around 10 or 9 depending on where I was going.
Got a new toy hauler and it weighs 7,000 to 7,5000 dry. Havnt put water in it yet, just a 10 gallon jug of water and two dirt bikes with some gas cans. I am getting 7.4 MPG. I went 170 miles and the fuel light came on.
Is this to be expected? It is stock excpet for the 4" turbo back and the bullydog intake.. (I know I should use the stock one)
Any thoughts. No codes on the SGII. oil and water temp stay within 15 degrees. But its pushing it.
Thanks,
Junior User
Joined: Aug 2013
Posts: 76
Likes: 0
From: DFW
That's way low. My Excursion is getting 13 around town doing 90% 2-4 mile trips. Even before all the work, getting 14+ towing about 8k wasn't hard but not towing was 16-17. Now 18-19 on the road is easy. Based on 1 700+ mile rushed road trip that included about 100 miles in city traffic and 200+ on country roads I got 18.5, running pretty hard on the road. Granted, this latest is after a lot of work but prior to that my MPG was still much better to say the least.
Fleet Mechanic
Joined: Sep 2013
Posts: 1,303
Likes: 84
Seems low to me as well. do they have winter mix fuel where you are? that will knock it down 1-2 mpg plus idle time to warm up its hard to figure in the winter months. If your hubs are locked in you will get less mpg as well. I get noticable lower MPG if I leave them locked in even when not using the 4wd. Is it down on performance at all?
Fleet Mechanic
Joined: Jul 2013
Posts: 1,330
Likes: 65
From: 'Pitlock, Maine
Anything less than 13/14 I'd be looking for the reason why, The 7.5 you say you get would have to be uphill,rocky with the wind in your face pulling that kind of weight, I see people commenting on here all the time getting 13 plus pulling 5ers. just sayin'
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or sticking front caliper...
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From: Middle Tn.
I know not to expect much for MPG is these trucks, just want to get a feel for what I should get towing..
I usually get 11 to 12 around town and up to 15 on the highway. My old toy hauler weighed about 5,000 lbs and I was getting around 10 or 9 depending on where I was going.
Got a new toy hauler and it weighs 7,000 to 7,5000 dry. Havnt put water in it yet, just a 10 gallon jug of water and two dirt bikes with some gas cans. I am getting 7.4 MPG. I went 170 miles and the fuel light came on.
Is this to be expected? It is stock excpet for the 4" turbo back and the bullydog intake.. (I know I should use the stock one)
Any thoughts. No codes on the SGII. oil and water temp stay within 15 degrees. But its pushing it.
Thanks,
I usually get 11 to 12 around town and up to 15 on the highway. My old toy hauler weighed about 5,000 lbs and I was getting around 10 or 9 depending on where I was going.
Got a new toy hauler and it weighs 7,000 to 7,5000 dry. Havnt put water in it yet, just a 10 gallon jug of water and two dirt bikes with some gas cans. I am getting 7.4 MPG. I went 170 miles and the fuel light came on.
Is this to be expected? It is stock excpet for the 4" turbo back and the bullydog intake.. (I know I should use the stock one)
Any thoughts. No codes on the SGII. oil and water temp stay within 15 degrees. But its pushing it.
Thanks,
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Thread Starter
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Mountain Pass
Joined: Aug 2012
Posts: 249
Likes: 0
From: Boise, Idaho
FICM is 48 and 11.6 on the battery when starting then goes back up, the lowest I have seen the FICM is 47 I think. I just had that and the batteries and FICM replaced in December of 12'.
I am changing oil next week, it's not time to do fuel filters yet but I will just to make sure something is going on there.
What else should I be checking?
It doesn't really run any diffrently. Just seems to be working harder to tow. I did not have the hums locked in on they way to camp last weekend but locked them when I left becuse of a small sand section, and left them locked on the way home. That took it from 8.6 to 7.4 on the way home.
I should have mentioned I have big tires and wheels on too.
I am changing oil next week, it's not time to do fuel filters yet but I will just to make sure something is going on there.
What else should I be checking?
It doesn't really run any diffrently. Just seems to be working harder to tow. I did not have the hums locked in on they way to camp last weekend but locked them when I left becuse of a small sand section, and left them locked on the way home. That took it from 8.6 to 7.4 on the way home.
I should have mentioned I have big tires and wheels on too.
Thread Starter
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Mountain Pass
Joined: Aug 2012
Posts: 249
Likes: 0
From: Boise, Idaho
I just had the axels flipped on the new hauler and they checked the breaks and bearings then and all was good. Taking it in to rotate tires today. I will aks them to check the rotors as well. Any thing else I should have them look at?
Senior User
Joined: Nov 2010
Posts: 419
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From: Iowa
Did you figure in your tire size in your mpg calculations? Has your speedo been calibrated for the larger tires?
Towing my enclosed trailer I get 12-15mpg going 70-75mph down I-80. 12 is with a headwind so strong I'm still pulling 20psi of boost downhill...
Towing my enclosed trailer I get 12-15mpg going 70-75mph down I-80. 12 is with a headwind so strong I'm still pulling 20psi of boost downhill...
Junior User
Joined: Aug 2013
Posts: 76
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From: DFW
Define big. That absolutely could make a difference, or difference in the overhead in the case Kent0307 suggested.
Thread Starter
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Mountain Pass
Joined: Aug 2012
Posts: 249
Likes: 0
From: Boise, Idaho
They are a 325/60R20. I know that will make a difference. I have not calibrated the speedo yet either. I heard there is a way to calibrate with the SGII anyone know if that is true?
I have had the same tires for two years and never done it, just seems like the MPG dropped significantly over the last month or so.
I have had the same tires for two years and never done it, just seems like the MPG dropped significantly over the last month or so.
Junior User
Joined: Aug 2013
Posts: 76
Likes: 0
From: DFW
Oh, so they're not huge, but much bigger than stock although probably 30lbs heavier. Unless you started running them really low on psi, obviously they wouldn't have caused the MPG to just drop like that.
I was thinking you were going to say you were running 37's on 12" wheels or something.
I was thinking you were going to say you were running 37's on 12" wheels or something.