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Discussion Starter #1
My low fuel light has been coming on when the trip meter says I have used 25 gallons of gas and the gas gauge reads about 1/8 of a tank. The miles to empty says about 40, but isn't counting down mile for mile as I drive.

When I have filled up, I have put in about the same amount as the trip meter says I have used.

I thought this truck was supposed to have a 35 gallon tank? There can't be 10 gallons of "reserve" can there?

I have only filled it up a few times since I only have 1000 miles. Is there some kind of self-calibration the system needs to go through with more use?

Is mine normal compared to the other trucks? I have a dealer appointment for Monday hoping they will find the computer is programmed for the wrong tank size or something like that.

Thanks,
Aaron
 

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Seems like a BIG cushion built in!
It's 35.
 

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I wouldn't put too much trust in those "miles until empty" numbers. They are seldom accurate. We had a customer bring his new F350 in for a complaint that would require test driving it to determine that source of the problem but the customer only had about 1/8 tank of fuel when he left it at the dealership. The technician got in it, realized how low it was on fuel and noted on the repair order that he could not test drive it due to insufficient fuel. The customer came in and was angry that his truck was not worked on. We explained that a technician that is paid $25.00 an hour can not take time away from working to go to the diesel station that is 5 miles away (in city traffic) or take a chance on running the vehicle out of fuel. The owner pointed out that his "miles until empty" message showed he had 34 miles before it would run out of fuel. We explained that they were not entirely accurate but he left in a huff. He called about 15 minutes later REALLY mad because it ran out of fuel before he made it to the gas station.
 

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Discussion Starter #4
Is there a real mechanical level sensor in the gas tank? What triggers the low fuel light on the dash?

Thanks,
Aaron
 

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Not sure about the 2015 but up to 2014 the long bed trucks have a 35 gallon tank, short bed trucks have a 26 gallon tank.
 

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All 6.2's long or short bed have 35 gallon tanks.
 

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I just filled up yesterday.
15 miles to empty.
It took 30.4 gallons.
 

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Discussion Starter #8
I went to the dealer today with my trip computer saying 28 gallons used and 8 miles to empty. They plugged the computer in and confirmed the truck is setup for a 35 gallon tank and said my tank was 8% full which is 2.8 gallons remaining.

I filled it up and put in 31.6 gallons; the trip computer said 28.5 gallons used at that time so it was reading about 3 gallons short.

This tank was all city driving so maybe that throws the computer off some. I'll just have to get some miles on it and either it will learn my driving or I will learn how the system is going to work.

Aaron
 

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Ive heard this before but my 2014 short bed 6.2 has never come anywhere close to putting in 35 gallons. its always around 26.
From the ford spec. sheet....
2015
s
up
er duty
®
ford.com
super duty specifications
Standa
R
d F
E
atu
R
ES
Mechanical
97,500-mile tune-up interval
4
(gas engine)
Battery saver
Conventional spare tire/wheel/jack with
underframe carrier (crank-down type)
Engine-only traction control (EOTC) (DRW only)
Fail-Safe Engine Cooling System (gas engine)
Fuel tank – 26-gallon capacity (F-250/F-350 137,"
142" and 156" WB with diesel engine)
Fuel tank – 35-gallon capacity (gas engine)
Fuel tank – 37.5-gallon capacity (F-250/F-350 158"
and 172" WB with diesel engine, and F-450)
Hill start assist
Jack – 2-ton mechanical with SRW, 4-ton hydraulic
with DRW
Power steering
Stabilizer bar – Front
Stabilizer bar – Rear (DRW only)
Stainless steel exhaust system (major components)
Stationary elevated idle control (SEIC)
5
Steering damper
Tailgate – Removable with lock and tailgate assist
Tire Pressure Monitoring System
(SRW only; excludes spare)
Trailer hitch receiver – 12.5K (2") Built Ford Tough
®
(SRW with gas engine; SRW with diesel engine and
137" and 142" WB)
Trailer hitch receiver – 14K (2.5") Built Ford Tough
(SRW with diesel engine and 156," 158" and 172" WB)
Trailer hitch receiver – 15K (2.5") Built Ford Tough
(DRW with 156" and 158" WB; DRW with gas engine
and 172" WB)
Trailer hitch receiver – 18.5K (2.5") Built Ford Tough
(F-350 DRW with diesel engine and 172" WB; F-450)
Trailer hitch receiver – 2" sleeve reducer (vehicles
with 2.5" receiver)
Trailer sway control
Interior
Assist and ride handles
Coat hooks – 1 (Regular Cab); 2 in rear of cab
(SuperCab and Crew Cab)
Dome light/map lights (front and rear with Crew Cab)
MyKey
®
Overhead console with garage door opener storage
and sunglasses storage (SuperCab and Crew Cab)
Powerpoints – 12-volt, 2 on instrument panel
Windows – Flip-open rear quarter (SuperCab
 

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I never pay much attention to the Mile to Empty readings...they are nice but vary with the average mpg of the truck as you drive it....I use Trip Meter A....when i fill up, I reset Trip Meter A and the MPG screens...then I check the number of gallons used on the Trip Meter A as i travel on a trip...more accurate than Miles to Empty in my simple mind

JMHO
 

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Aaron

My F350 Crew Cab, 8' bed, 4x4 is exhibiting the same information as you posted. i'm gonna put a 5gal gas can in the back and run her dry...

I'm gonna be PISSED if this truck has a 26ga tank!!!!
 

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Discussion Starter #13
I would be very interested in the data from you running it dry. I ran mine on 0 miles to empty for 15 miles or so and put in ~34 gallons if I remember correctly. I generally fill up when the trip meter says ~30 gallons used and put in 32 or so.

Aaron
 

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Im at 150K miles so I have had many fillups and the most I ever got into my tank was 32.2 gallons and the needle was pegged on empty and the low fuel message was on.
I think there is a 2-3 gallon "cushion" on the 6.2 If indeed it has the 35 gallon tank.
 

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When I bought my truck the salesmen told me I have about 32 usable gallons in the tank. The most I've been able to put in is 30 gallons.
 

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It's also worth noting that how the truck sits when you fuel it can add or reduce the amount you can get in it. My F450 and F450 had 62 gal Titans in them but the filler game in about 2' in front of the back of the tank. If it was leaning right to left and back to front there was a two gallon air bubble in there.

Unless you use same pump at same station, parked the same way repeatedly you may or may not "fill" it.

The F150 I have now is same way.I can use 28 and put 30 back in.
 
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