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Fuel tank size and factory computer settings

MSundet

MSundet

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I have been wanting to get a larger fuel tank for my 2018, now that I bought a 2020 I would like to look at seriously installing a larger fuel tank. There are two questions I have....


1. What fuel tank do I go with?


2. Who reprograms the factory computer for all the settings?
 
In the past it wasn't possible to reprogram for tank size, but now with the 2020 CC models having 50-gallon tanks as options, there maybe a way.
 
carlrx7 said:
In the past it wasn't possible to reprogram for tank size, but now with the 2020 CC models having 50-gallon tanks as options, there maybe a way.
Click to expand...

That’s where my brain was going as well just thinking there might be a way ....


Sent from my iPhone using Tapatalk
 
I bought a Titan 55 gallon fuel tank and love it. The distance to empty isn't right until you burn off the first 20 gallons but after that it slowly adjusts and is pretty accurate. The fuel gauge reads correctly as well. I just reset the trip meter when I fuel up and pay attention to miles. The computer being wrong is a small price to pay for that much extra range. There probably is a way to re-program it but I haven't bothered.
 
I have a 6.7L gasser with the stupid standard fuel tank and I hate it. I go to town a few miles down into the valley and get fuel, I drive back up onto the ridge to home and the gauge is already showing less than full. I wish it had a 120 gallon tank so that I wasn't buying fuel every time I drive the thing. Then you have Titan who makes a tank only for the diesel version of trucks.... what about us poor gasser guys who have a 200 mile fuel range!!!???? Damn the world!
 
Capital E said:
I bought a Titan 55 gallon fuel tank and love it. The distance to empty isn't right until you burn off the first 20 gallons but after that it slowly adjusts and is pretty accurate. The fuel gauge reads correctly as well. I just reset the trip meter when I fuel up and pay attention to miles. The computer being wrong is a small price to pay for that much extra range. There probably is a way to re-program it but I haven't bothered.
Click to expand...
^^^100%^^^
Best money I spent on the truck. Don't sweat reprogramming. The bonus is you have more reserve when the low fuel light comes on. The peace of mind when pulling heavy is priceless!
 
I wish mine had the bigger tank. Our first fill up leaving town is 189 miles then 254 miles after that one.
 
Capital E said:
I bought a Titan 55 gallon fuel tank and love it. The distance to empty isn't right until you burn off the first 20 gallons but after that it slowly adjusts and is pretty accurate. The fuel gauge reads correctly as well. I just reset the trip meter when I fuel up and pay attention to miles. The computer being wrong is a small price to pay for that much extra range. There probably is a way to re-program it but I haven't bothered.
Click to expand...

How far off do you think the fuel gauge is off and or miles to empty now that you have been driving it with multiple fill ups??


Sent from my iPhone using Tapatalk
 
MSundet said:
I have been wanting to get a larger fuel tank for my 2018, now that I bought a 2020 I would like to look at seriously installing a larger fuel tank. There are two questions I have....


1. What fuel tank do I go with?


2. Who reprograms the factory computer for all the settings?
Click to expand...
I would assume you would have the dealership install the larger tank, what did they say about reprogramming?
 
MSundet said:
How far off do you think the fuel gauge is off and or miles to empty now that you have been driving it with multiple fill ups??


Sent from my iPhone using Tapatalk
Click to expand...

Here is what I think happens based off my experience so far. Keep in mind this is not scientific at all but I've put about 5,000 miles with the bigger tank and these are my observations. The factory tank was 36 gallons and the Titan tank is 55. When I fill up my distance to empty reads roughly 380 miles and the gauge says full of course. The miles to empty and fuel gauge don't move until I drive about 200 miles and then they both start to drop accordingly. I'm assuming that once the level in the tank reaches roughly the amount that the factory tank held the computer figures it out and is pretty accurate from there to empty. Hopefully I explained that in a way that makes sense. It's pretty nice to drive 200 miles and not see the gauge move.
 
So looking at these tanks, they all say diesel... any reason why they wouldn't work on a gasser?
Lary0071 said:
I have a 6.7L gasser with the stupid standard fuel tank and I hate it. I go to town a few miles down into the valley and get fuel, I drive back up onto the ridge to home and the gauge is already showing less than full. I wish it had a 120 gallon tank so that I wasn't buying fuel every time I drive the thing. Then you have Titan who makes a tank only for the diesel version of trucks.... what about us poor gasser guys who have a 200 mile fuel range!!!???? Damn the world!
Click to expand...

There are options...

DOT Approved Liquid Fuel Transfer Tanks - Gas
Gasoline Auxiliary Tanks
 
I spoke with Titan when I had my gasser, and they claimed there is some DOT regulation that prohibits aux tanks for gasoline. They made it sound like they were prohibited from selling larger midship replacement tanks, as well. There is obviously a market for them, and they are in the business of selling tanks, so I would have to think there is some validity to what they said.
 
Lary0071 said:
Those aren't like a tank mounted under the body. I would like an aftermarket fuel tank that replaces my little one that came in the truck.

Sent from my SM-N960U using Tapatalk
Click to expand...

Sadly, you aren't going to find any... I would tend to agree with @1HasBeen...
 
Lary0071 said:
That sux. The range on the 6.4 is annoying at best.
Click to expand...

I made it from Tampa to Charleston SC on a tank of gas... that's a bit over 400 miles... really haven't done any significant towing, the one time I towed a 9K# or so TT across the state and was getting about 11mpg.
But I agree, the option for a larger tank to replace the 31 gallon OEM tank would be great.
 
When pulling heavy, my 6.4 averaged 7.5-8.5 mpg, so every 150-180 miles you better be hunting for fuel. The Flying J app was very handy.
 
1HasBeen said:
I spoke with Titan when I had my gasser, and they claimed there is some DOT regulation that prohibits aux tanks for gasoline. They made it sound like they were prohibited from selling larger midship replacement tanks, as well. There is obviously a market for them, and they are in the business of selling tanks, so I would have to think there is some validity to what they said.
Click to expand...
Dot refs be damned. There is a limit, I don’t recall exactly what that is but when a big rig can carry north of 300gal, i wouldn’t be all that worried. As long as tank is approved.
 
Bozo said:
Dot refs be damned. There is a limit, I don’t recall exactly what that is but when a big rig can carry north of 300gal, i wouldn’t be all that worried. As long as tank is approved.
Click to expand...

That's not really a very good comparison as we are talking about gasoline and not diesel.
The tanks are not approved for gasoline.. only diesel.
Diesel is a flammable liquid while gasoline is a combustible liquid and more dangerous than diesel.
 
Gondul said:
That's not really a very good comparison as we are talking about gasoline and not diesel.
The tanks are not approved for gasoline.. only diesel.
Diesel is a flammable liquid while gasoline is a combustible liquid and more dangerous than diesel.
Click to expand...
I was referring to gallons carried limits, not a specific product. Exxxxxxxxcuuuuuuuuuse me!
 
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