I've been thinking about this and it has me wondering now myself.. So not that I intentionality let it get this low but I got my gas low enough that it was resting on the peg and I had no signs of stumbling or anything like that.. Now when I had my 95 Legacy when I started to get that low and make left hand turns it would start to starve for fuel.. So now this morning I was driving to work and I was a bit above empty and next thing I now I'm under and I'm resting on the peg again..

 

So I put gas in after work.. $15 worth was about 3.9 Gal.. So that brings it up from the peg to 1/4 and I'm thinking that can't be right?

 

And while driving home I noticed it went down a little bit but then came back up.. I was thinking about pulling the assembly and testing the fuel sender.. From what I hear a full tank should be about 1 MegaOhm and I forget what the lower end should be.

My 95 wagon is the same way. The needle moves up and down all over the place. I've watched it move from 1/8th tank to up over 1/4.

Last week I set the needle on the peg then drove to work and back two more times. Only took 13 gallons to fill it. I have noticed though that the needle on the wagon comes down form full much sooner than my sedan ever did. Going by the gauge, (which is pointless) I typically only get 40 miles out of that first "quarter".

My sedan does at least 60 miles of the same type of driving to move that first "quarter".

 

I have some BG 44K that I'm going to pour in the wagon and maybe it will help the fuel sender. Don't know.

Never got to pull it today to check but yeah my 95 impreza was really bad anything at 1/2 and going up a hill would read empty lol.

 

Next month I should know more driving down to VA then NC

I probably shouldn't say amything because I own a 2005. But, I was at my sending units last year at this time. In this newer car the closer to 0 ohms the closer to full the reading and 90 to 95 Ohms was empty. ...rrrr the other way round. Point being a Megaohm seems really high. 50 ohms put me at a perfect half tank.

I have a look at the manual again to be sure I may not pull it at all this week since I don't want the inside to smell of fuel with the girlfriend coming up.

Just keep track of your trip meter if you don't trust your gas gauge.

My 96 had a random gauge sometimes, BUT, the low fuel light is a totally different circuit. And that always came on when there was just over 2 gallons left, regardless what the gauge said. So that's nice, at least.

Ok I need to find one.. If you check on car parts it never says which sender it is.. and being as it's not that big I don't want to drive out and see they don't have it.. (happened when locating a transmission)

 

Since I put a full tank in and drive about the same way each week I figured around 260-280 it would start to show the low fuel light.