So I started the Ex this morning and the Lie-O-Meter said 4 Miles to Empty..
Hmm Last night it was still saying 63 Miles.
So I would say that when the Light comes on you have about 1 gallon of fuel left in the tank

 

I would say it depends on the vehicle.

 

I'm not sure you understood my post above. There's no way to say how much is left when the light comes on because there's nothing that measures the precise amount of fuel left in the tank. The float in the tank is far, far (very far) from precise.

As for the lie-oh-meter "Miles to empty", it's all based on the math calculated by the lie-oh-meter.

Like I posted earlier, I've driven around when it said zero miles left. My wife even ran out of fuel when the lie-oh-meter showed miles left to empty.

When the light comes on, it could be a gallon, two gallons, or a half a gallon. The light can even go out and then come back on while driving the next day.

Stewart

 

when my light comes on i have at least 6-8 gallons left. this is different then my other Excursions. you have to know your truck and driving conditions to really know how far you have to go once the light comes on.

 

I just put the second 5 gallon can I had in it and it comes close to 1/4 tank.
If it was not such a B!tch to drop the tank I would do it again and adjust the float
I have three cars that are all Tdi's (00 golf 02 Jetta 05 Passat) and they all turn the light on when you will stall in 55 Miles

 

Not sure what kind of adjustment you can make, short of re-engineering the float and sensors and replacing everything.

Stewart

 

You bend it a 1/4" to 1/2" so that it reads all the way to the bottom and a little less on the top of the tank

 

Another thing is I have put 47 gallons in my 44 gallon tank so it makes it even harder to judge how much is left when you fill up.

 

It already reads all the way to the bottom. Your adjustment will not make it any more accurate or precise, and precision is the problem with the Ford setup.

Stewart

 

Well when it hits the bottom my needle is just touching the red line and when it's full I can go 60 miles until it is below the full line

 

How do you know when the float is on the bottom?

Again, it's about the precision of the Ford setup. It's about the sending unit and the sensors and how the display (the needle) is set up to relay that info.

You're assuming the float is not accurate, and that's not where the problem lies.

Stewart

 

That reminds me of the gas stations that read a little bit more than actual. Obviously not that much. But worth trying a few stations.

I've heard of stations recently with calibration off to their advantage. Harder to find on a smaller tank. Noticeable on a big tank.

 

I have run across them in the Midwest between distant cities at little family stations (crooked families) and as for fixing the lie meter warning; just adjust for it, more trouble than it's worth.