DR9

I looked under the truck and it seems to be a very long tank but on the dash screen I'm nearly at the red line and used 25.6 gallons on trip 2 (I did reset on a full fuel up).

This doesn't seem right? I am in Normal DTE mode also, not towing. Would this be why I am seeing horrednous MPG 13 Highway 11 City on the trip meters?? Something not set correctly on the fuel side to say I have a larger tank?

The total miles so far is about 400 miles @ the red marker. Seems way off.

Any help or ideas?

Krieg

From what we've determined (in other threads on this same subject) part of it has to do with the design of the tank and the use of the same fuel sender for both tank versions. In short, because of the shape of the tank, the 0-float level for the small tank is the same as on the larger tank, but the larger tank because it's longer actually holds a bunch more fuel at that level.

The rest is witchcraft and Congressional. Don't poke it with a stick or you might contract rabies.

Mark F150

So does that mean there is a 10 gallon reserve? I guess that gives you plenty of time to find a gas station.

What does the DTE read? Even with your reportedly poor mpg you should still show about 100 miles to empty.

Hopefully there is some calibration they can do to the gauge.

gsxr1216

My 2012 and my 2015 both had the 36g tank and when I get close to empty on the gauge ( 70-80 DTE) both trucks would take over 30g to refill them so the gauge itself seems to read pretty close to whats left in the truck in my case


I can say that on my 2012 the gallons used in the trip computer always read low to what the truck actually took to refill, like 1.5-2 gallons lower on every fillup. I don't have enough miles on the 2015 yet to determine its accuracy yet in that respect.

Kenn213

Krieg's response would make sense. I pulled in to a gas station just about on E and was surprised to only see ~27 gallons go in. I was actually wondering if I had the smaller tank and some gas magically evaporated or something.

DR9

so your saying when Im at Empty I have 10gallons left and can keep driving for 200 more miles?

pb65stang

I filled up after a 550 mile road trip yesterday (one tank) with about 50 miles showing on the gauge until empty. It took 32 gallons, with no extra clicks. So no, I do not believe you should have 10 gallons left at empty.

Krieg

I thought you said you were getting "horrednous" gas mileage? 20mpg ain't bad.

Anyway, here's the differences:

TenacG15

To chime in on this one, I filled up with reading 80 miles left on the range and put in 32.4 gals. I don't think the length is effecting it that much to be honest.

gwpfan

How many miles are on the truck?

My 12, wife's 13 and my 14 the first few tanks the gauge was 'way' off IMO. I had like 6 plus gallons to empy, yet it said I was empty.

I finally drove all past the 0 miles to empty a ways, with knowing gas stations nearby and they seemed to calibrate better. One thing though is if you pull on the nozzle a second time it'll throw the numbers off. While I normally let it click out a second time, when I don't the trucks are a lot closer to the gallon used number they display, after actually letting the tank run low.

As a disclaimer one thing I did was knowing I didn't let my truck idle for long and knowing I should be getting better than 13 mpg I quickly did the math in my head to make sure I 'shouldn't' run out of gas.

Now I once was on a road trip with the nagging wife who won't let the fuel level get less than a 1/4 tank and really pushed it since every exit with gas she would nag about getting gas. Ran out of gas almost at the top of the hill less than 300' from the gas station. Yep my stubborness had to get out and push about 40', but she coasted to the gas station. That vehicle seemed to be dead on after that. I suspect the calculation is very conservative and by forcing it to actually get closer to empty it calculates better.