Fueled up a few minutes ago, distance to empty showed the lowest I've let it get so far, down to 40 miles to empty.
Took 42.4 gallons to fill it up, so supposedly if the tank is 48 gallons then there was 5.6 gallons still in it.
I don't know how much of the 48 gallons is actually useable though.

Filling up really pissed me off though, first went to Kroger because I had some fuel points to use.
Fuel price was $4.999, but between my pulling up to the pump and getting out to start fueling up, the price changed to $5.199!
So, I got back in my truck and went down the street to walmart and filled for $4.899.
Found out they don't give any discount for using a gift card anymore, used to get 3 cents off, another sucky deal!

Today's EFS discount at Flying J sucks so didn't go there like I usually would.

 

$4.89 that's cheap, I am jealous of that

 

Diesel is 6.89 today

 

I'm seeing as high as $7.39 around here. I noticed they spiked right before the holiday weekend but I had hoped they would drop after. Instead they have continued to go up. I don't imagine I'll see diesel in the $4-$5 range around here for a long time.

Shell stations also give a discount when using their gift card, although I have noticed it's not all Shell stations that participate. Also, the amount of discount can vary. Last time I tanked up at Shell it gave me 3 cents off for my rewards card plus 5 cents for the gift card.

 

Diesel fuel is 5.14 here in NE Wisconsin. I saw 4.98 last week but couldn't fill up the truck, it was in the body shop getting some hail damage repaired.

 

Still cheaper than what we paid in europe 20 years ago... 9.50 a gallon. Converted from metric and euro's.
It was still the cheapest part of the trip🤑🤑😭

 

Ive driven until 1 mile until empty and can get 42-44 gallons ( poor memory ) . Ford says there has to be fuel left in the tank for fuel pump cooling purposes in addition for such a large tank there has to be a small reserve to pick up fuel on hills going up or down.

One day I may carry a couple 5 gln cans and see how far past zero I can go but I dont want to damage the pump since they said fuel helps cool the pump

 

I have run my 48 gallon tank down to 5 miles to empty before and was able to pump in around 46 gallons to the top of the neck.. I have also had it not start when I parked on a tiny incline when at 15 miles to go as well. 2 gallons in that tank doesn't give you alot of depth

 

I've been told that unless you're on a long haul, it's best to keep a diesel tank full to avoid condensation or algae or something.

 

That's what I've heard as well, fuel cools the pump. Probably doesn't cause immediate damage but heat isn't your friend in machinery. That, and one time I was dumb enough to run out of gas on the Ohio turnpike, lucky enough to be about a mile from the next plaza. If anyone thinks walking along a road with trucks whipping past at 70 is fun, think again.

 

For anyone wanting to know how much further they can get after 0 miles, best practice is to fill up at 0 miles and see how many gallons go back in the tank. Much better than running dry and filling with a gas can on the side of the road. Just my opinion anyway.

On a side note, I installed an S & B 68 gallon tank on my 2020 LB diesel. If you think your gauge is off with the stock tank you should see these things. The way the tank holds more fuel is by not only making it longer but also taller from the humps on top and deeper along the entire length. I’ve checked capacity two different ways. One was by physically pulling the tank down when the gauge is on E. At this point I have almost 8 gallons left. I pulled the tank because I wanted to see if there was a way to put an extension on the float arm, there is not because of tank design. The other way is filling up at E. Both are close. Pulling the tank isn’t hard if you run it down before. Of course as you would suspect, filling at E is the better way. Note I did not pull the tank just to check how much fuel was left.

THE ISSUE comes with the DTE calculation. I used Forscan to change the calculation for the proper capacity but this does not entirely work since the stock float does not travel all the way to the top AND all the way to the bottom. The float at the top is the biggest issue because it throws off DTE since the gauge doesn’t start to move till 100 to 250 (towing vs not towing) miles of driving. Once I hit E I know how many gallons are left and about what I get for MPG. It can be a little frustrating but I would much rather have the 68 vs the 48 for pulling my 5th wheel and staying out of truck stops as much as possible.

SOMETHING ELSE I noticed, the guys talking about heat from the pump and running the tank low, I’m not sure this is a real issue. The way the fuel comes back to the tank, it dumps into a cup that the pump is submerged in. As long as there is fuel to be picked up in the tank there is fuel returning back to this cup and the pump is always submerged. Yes less fuel would get warmer but I wouldn’t think it would get that hot.

Edit: this advertisement came up after I posted this. The **** that gets my attention. LOL

 

The other thing about the distance to empty miles showing is that the number varies depending on the instant average fuel economy, the DTE will go way up when the instant fuel economy changes, like when I drop a trailer and start bobtailing, the distance to empty starts going up even though the truck is still using fuel as it goes down the road.