The owners manual does not give a specific, so I am wondering if anyone knows how much fuel is left when the Low Fuel Warning light comes on for the 7.3L diesel.. did not find the answer in a search ... I tried

 

As far a I know, the low fuel light is preditive it will come on at a avarage fill up time.
Lets say you always fill up at a 1/4 tank then it will come on at a 1/4 tank were if you always fill when it reaches the red line it will come on there.
I have ran mine way below the red line ( not good ) were it took 26 gallons to fill up ...

 

Not true. Light comes on the same level everytime regardless of when you fill up.

I do know that on mine, once the overhead says 0 miles to empty I still have about 5 gallons past that. I know this because the last fill-up, I actually pumped 44 gallons.

 

Mine comes on with 8 gallons left.

 

You must mean 36 gallons?

For mine, once the light comes on, I have approximate 7 gallons left in the tank.

 

I have a V10 but I need about 36-38 gallons to fill up after my light comes on. I think when my overhead console went to 0 miles to empty I filled up with around 39 gallons. My fuel pump hates me...

 

If your below the red and filling up with 26 gallons something is wrong with your gauge or fuel level sending unit in the tank.

 

Brain dead Me 46 gallons .......... Then I wonder why I don't post so often LOL

 

Posting more makes one less brain dead...oh wait...that's not right...

 

Thanks for the support ............

 

Wait a minute, I thought the Ex only had a 44 gallon fuel tank. How are ya'll's numbers supporting this? Am I wrong with the 44 gallon tank size? I believe I read in the owners manual it was 44 gallons.

Please advise.

 

you're right, its 44 gal.

but maybe if you keep topping off you might get an extra gallon or so maybe?

 

It varies from rig to rig. The float in the tank only provides a general approximation, not a specific amount of fuel left.

Think about it, if the gauge were to show the specific amount, when the tank sloshes to and fro, your indicator would rise and fall with the sloshing.

My Ex is more predictible than my F250. I've had the light come on for my F250 while tooling down the freeway, then 10 minutes later, go off. I've also had it come on while driving home, then the next day it's off, and it stayed off for two more days!

Stewart

 

A lot of vehicles will give you a specific, My wife's Audi for example is like 2.6 or 3 gallons, its in the owners manual

 

My 2003 Excursion 6.0L diesel (not sure if gas motors are different) holds 44 gallons.

My "warning light" comes on with about 60 - 80 miles to go and I have even ran it down to when the overhead console said I had "zero miles" left!!!

When I pumped diesel into my tank, I could get 41 gallons in... so that meant I had between 2 - 3 gallons left or an additonal 30 miles before I ran bone dry (which you should never do in a diesel)!!!