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Old 05-25-2018, 10:24 AM   #1
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Half-ton Towing MPG

Morning all!
So I picked up my new travel trailer out of state yesterday... pulled great on the way home no issues there. I have hauled before and the MPG was about the same, maybe even a little better.
That said, my highway MPG while towing in tow/haul mode is about 10mpg.

It could be worse I suppose, but its not good thats for sure.

Have any of you used a programmer to tune the truck for better towing and hauling mpg/ performance? Which did you use?
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Old 05-25-2018, 10:25 AM   #2
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Thatís about right
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Old 05-25-2018, 10:44 AM   #3
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That's pretty good for a half ton truck.

Which one?
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Old 05-25-2018, 10:45 AM   #4
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Ours does 11MPG towing @ 60MPH with the rig in my signature on level.
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Old 05-25-2018, 10:58 AM   #5
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Sorry, can't help with the tuner/truck question. The only tune I have is a 93 octane tune in my Mustang - and yes, i can tell the difference
Seriously though, thinking about it, I'm not sure I would want a tune in a TV. I would try a cold air intake first and let the MAP auto adjust for the higher air flow within the computer. I would be nervous that a tune would lean out the engine. Take this with a grain (or bag) of salt, I'm not a mechanic; but i did a lot of research before getting the tune for the Mustang.
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Old 05-25-2018, 11:09 AM   #6
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That is about average for your truck. Depends how fast you are towing. What gear ratio do you have. I tow 9000# with3/4 ton and 4:10 gear 6.0 eng and average 8.5 to 9mpg at 62 mph. Later RJD
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Old 05-25-2018, 11:16 AM   #7
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Quote:
Originally Posted by MillMitch View Post
Seriously though, thinking about it, I'm not sure I would want a tune in a TV. I would try a cold air intake first and let the MAP auto adjust for the higher air flow within the computer.
Please explain how you think a CAI would help with MPG at highway speeds. The engine is running at some RPM that is less than 2000RPM. At a given RPM, you consume an exact volume of air. Doesn't matter what intake you have.

A CAI would only help you getting to an extremely high RPM. It's a complete waste of money and just sounds loud. If a CAI would actually make a truck engine perform better, don't you think the OEMs would put them on at the factory?

I used to work for GM. The engineers that design the program for the ECU were always amazed when they heard of what the tuners were doing. They said that they go through 1000s of hours determing the best settings to get the best performance and longevity for the engine and they know the whole system inside and out. How are the tuner people doing something better than they do without really understanding the whole system. Needless to say none of them recommended using tuners.
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Old 05-25-2018, 11:39 AM   #8
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Thanks for the thoughts guys...
the big thing I am looking for is a way to put 6th gear back in play when towing on the highway. I have found that If I shut the tow/haul off then the tranny seems to have a hard time finding the right gear. I like how it pulls in tow/haul. I just want it to use 6th gear when at speed.

Also, I have read conflicting information that tow/haul also increases the tranny cooler pressure, making it more effective- I want to be sure that is still turned on.

I was hoping a programmer might open sixth gear back up and extend how long the truck would go before dropping to 5 to maintain speed. When we are talking about these kinds of mpg, even 2-4 extra miles could save $25 per fill up. Doesn't sound like a lot, but if your taking a long haul... that could be several hundred dollars...
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Old 05-25-2018, 11:55 AM   #9
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How heavy is the trailer? I saw a post last week from a guy with an eco diesel ram 1500 claiming 15MPG but it was only a 3 or 4 pound trailer.
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Old 05-25-2018, 11:57 AM   #10
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Quote:
Originally Posted by babock View Post
Please explain how you think a CAI would help with MPG at highway speeds. The engine is running at some RPM that is less than 2000RPM. At a given RPM, you consume an exact volume of air. Doesn't matter what intake you have.

A CAI would only help you getting to an extremely high RPM. It's a complete waste of money and just sounds loud. If a CAI would actually make a truck engine perform better, don't you think the OEMs would put them on at the factory?

I used to work for GM. The engineers that design the program for the ECU were always amazed when they heard of what the tuners were doing. They said that they go through 1000s of hours determing the best settings to get the best performance and longevity for the engine and they know the whole system inside and out. How are the tuner people doing something better than they do without really understanding the whole system. Needless to say none of them recommended using tuners.

I whole heatedly disagree with this . The engineers design the engines and drive train to perform in a way that they get them to drive well but at less then the actual power capability to keep from having to do so much warranty work . Most vehicles are factory tuned with a lot left on the table and some don't even work right with the factory tuning hence the reason 75 percent of diesel trucks are tuned for better mileage smoother shifting and more power where its needed . Conservative tuning can be extremely beneficial in many ways . There are lots of good tuners out there .
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