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I have a 3.42 gear ratio and get around 7mpg loaded with 32k. But unloaded around 10mpg
Fuel mileage average Hauling 30k+lbs ?
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What are y’all averaging and getting if you have 3.42, 3.73 or 4.10
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that is going to vary wildly from truck to truck, there are so many factors that have nothing to do with the engine and gear It's not even funny. I think it might be better to dial in your MPG unloaded, get that as good as you can, at least there are flat numbers there, fewer variables compared to others.
Most I have pulled is a 12k 5th wheel. I can say that I have seen 8-9mpg in house of headwinds, 10-12 towing in a lot of city stopping at every red light, and I have seen upper 16's with the same trailer running flat Texas highways with no wind. 08' 3.73 SRW.
Tells us about your truck, what you tow, where you tow, how you drive and what kinda of MPG you see, I think that's a good start to see if you fall inline or have issues.
Most I have pulled is a 12k 5th wheel. I can say that I have seen 8-9mpg in house of headwinds, 10-12 towing in a lot of city stopping at every red light, and I have seen upper 16's with the same trailer running flat Texas highways with no wind. 08' 3.73 SRW.
Tells us about your truck, what you tow, where you tow, how you drive and what kinda of MPG you see, I think that's a good start to see if you fall inline or have issues.
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I’ve been hauling hay recently and cattle I get better mpg with cattle the hay loads are usually 30k+ and the cattle are around 25k. I have 3.42 and probably gonna re gear to a 4.10 but as of now the truck pulls the weight just fine it’s just my mpgs are horrible compared to 4.10
Because I can get 22 MPG with my 3.42's...... empty.
They complain about gears, but tractor trailers are slowly gearing their axles down to low to mid two's, along with lower engine RPM's, better fuel mileage.
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Pickup consumers point fingers at the rear end gears, but they are only part of the equation. Personally, I would prefer to have those terrible 3.42's on my 4500 instead of the 4.10's I have, offset by a deeper 1st gear. This makes for a stronger and more efficient combination than the increasing trend of many overdrives with lower differential gears. Overdrives grow weaker and less efficient the further from 1:1 they get. A properly spec'd geartrain cruises at a low rpm in overdrive, and does it's hardest work in direct 1:1, which is the strongest and most efficient power path.
There's a lot more to it. Just know that if I could get your 3.42's I would. I also understand that paired with whatever automatic transmission you have, they may not work very well.
There's a lot more to it. Just know that if I could get your 3.42's I would. I also understand that paired with whatever automatic transmission you have, they may not work very well.
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OP - In my 2014, SRW with 3:42 gears, I would get anywhere from 9 -13 MPG max when towing my 32' cargo trailer. Probably 8k lbs total including trailer. Wind drag was way more detrimental to MPG, than the weight was. And as "7492" alluded too - I can get over 20 mpg empty.... 
My 2021 SRW with 3:73 gears gets about the same towing with that same trailer. Just performs better though. And empty, it's still can get over 20 mpg empty.
That being said, I'm assuming you have a Dually with towing 32k. So, if you're getting 7 mpg towing 32k lbs in a Dually, that sounds pretty darn reasonable. 10 mpg empty, depending on how and where you are driving, sounds reasonable as well. Maybe a little low. But so many variables....
My 2021 SRW with 3:73 gears gets about the same towing with that same trailer. Just performs better though. And empty, it's still can get over 20 mpg empty.
That being said, I'm assuming you have a Dually with towing 32k. So, if you're getting 7 mpg towing 32k lbs in a Dually, that sounds pretty darn reasonable. 10 mpg empty, depending on how and where you are driving, sounds reasonable as well. Maybe a little low. But so many variables....
2019 HO SWB w 3.73, I haul a 42' goose about 24k#. 8-12mpg range usually 9.something. I do have a heavy foot.
Truck performance is excellent, lots of power, accelerates like a train, super stable but I was hoping it would beat my old 7.3's mileage. It doesn't. 7.3 would do 11-14 same routes, but it has 3.08's which I installed because I couldn't live the 4.56 that came originally.
Truck performance is excellent, lots of power, accelerates like a train, super stable but I was hoping it would beat my old 7.3's mileage. It doesn't. 7.3 would do 11-14 same routes, but it has 3.08's which I installed because I couldn't live the 4.56 that came originally.
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At 45k gcw going 65mph I average 7mpg.
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The guys getting 22 average are doing a significant amount of highway driving btw. If you doing a majority of in town driving you won’t get anywhere near that. It really depends on your driving conditions.
my truck made like 11-12mpg when I lived and worked in city/town, tons of stop lights, idling and accelerating from zero. When I moved out to the country a little bit, where I hit the highway for 20 miles to get to work, I can now very easily hit 17mpg average without even driving nice, mostly where I’m at these days TBH, If I drive nice I hit 19-20 without much effort. Just understand that when people tell you you’re 8000# truck should be getting 22mpg
what does your daily drive look like?
my truck made like 11-12mpg when I lived and worked in city/town, tons of stop lights, idling and accelerating from zero. When I moved out to the country a little bit, where I hit the highway for 20 miles to get to work, I can now very easily hit 17mpg average without even driving nice, mostly where I’m at these days TBH, If I drive nice I hit 19-20 without much effort. Just understand that when people tell you you’re 8000# truck should be getting 22mpg
what does your daily drive look like?
My 22 MPG still shows me with a 27 MPH average.The guys getting 22 average are doing a significant amount of highway driving btw. If you doing a majority of in town driving you won’t get anywhere near that. It really depends on your driving conditions.
my truck made like 11-12mpg when I lived and worked in city/town, tons of stop lights, idling and accelerating from zero. When I moved out to the country a little bit, where I hit the highway for 20 miles to get to work, I can now very easily hit 17mpg average without even driving nice, mostly where I’m at these days TBH, If I drive nice I hit 19-20 without much effort. Just understand that when people tell you you’re 8000# truck should be getting 22mpg
what does your daily drive look like?
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