jason370

This makes obvious, perfect sense. It's a 36 gallon tank, so you should be able to fill it somewhere near 36 gallons, not 26. What does the 26 gallon tank full to, 15 gallons? I should've gotten the 90 gallon tank then, so I could fill 40 gallons

Eric M

I log all of my fillups in my phone.
I have a 36 gallon tank and the fillups over 30 gallons have been:
34.73
31.81
32.35
34.24
32.12
30.73
33.12
30.16
30.97
30.80

BrewCityF150

I have the 36g tank in mine. I generally don't let myself go below 1/4 tank, but when I'm at 1/4 tank, it takes ~27g, as one would expect. I've been below 1/4 a few times and put in over 30g.

Something clearly seems off if your sticker says you have the 36g tank but can only put in 26g.

marshallr

Because there were still 10 gallons in your tank when your gauge said it was empty. The problem isn't your tank, but the gauges. Give it a few more fill-ups for the computer to get some data for accurate comparisons.

These gauges are terribly inaccurate if the truck is on an incline. The tanks are long and skinny, all of the fuel goes to one end and you'll get very different readings depending on whether the nose is up or down

To be honest I NEVER look at the fuel gauge. I know about how many miles I can get on a tank of fuel and trust the trip meter. I do this on any car/truck I've ever owned.

BUT... the current F-150 is VERY accurate for me. The gallons consumed readout on my truck and mpg computation is always close. When I fill up the pump always shuts off within .2 or .3 gallons compared to the readout.

marshallr

Had a thought, and this is just a Scientific Wild *** Guess. But since they offer both 26 and 36 gallon tanks the trucks computer may need time to "learn" which tank is in the truck, or it may not have been programed correctly when built It may think you have a 26 gallon tank. I know mine is very accurate at predicting how much fuel I've consumed. The float in the tank that is connected to the needle gauge, not so much.

Since both you and the OP had issues at exactly the same point it would be logical. The OP's truck started giving accurate readings after a while. I think yours will too.

jason370

Does the truck stop the gas pump, or does the gas pump stop the gas pump? If it's the truck, how would a 36 gallon tanked truck stop a gas pump at 26 gallons? The pump doesn't know how big the tank is, it just stops when the tank gets full, no?

jbabins

yikes dude. When your gauge and mte says zero, it's wrong. You still have 10 gallons in your tank which is why it stops at 26.

Do as the other posters have mentioned. Either allow for a few more tanks or take it to the dealer.

Spiky

I'm out.

Learn how words work.

Tothemax

lol.

M0RRIS

I didn't read after page one, I saw it was 4 years ago when this thread was started.

Does bed size indicate what size tank? The 36 gallon (136 liters to me) is longer than the 26 gallon one no? So is it possible that it wouldn't fit in the trucks with the 5.5 box?

I know I have the larger tank, our prices are $1+ per liter and with the gauge telling me 1/8 of a tank left, I've pumped $120-130 worth.