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Depends on everything.
 

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I get worried when I'm in unknown territory and the gas light comes on. I try not to let it happen to often. The 1st gen has a 19 gallon tank. Usually it seems it takes about 16.5 gallons to fill from when the light comes on. That theoretically means there's about 2.5 gallons left. The fuel pump probably won't pick all of it up so at a guess I'd say you have one useable gallon left which to me means about 20 miles.

BTW I wouldn't make a habit of running it low for a couple of reasons. When the tank is low there is a far greater chance of the pump sucking up the gunk which means fuel supply problems. Also the fuel keeps the pump cool so running low could overheat the pump causing it's early demise.

It's also just as easy to keep the top half full as the bottom half....yeah I know I don't practise that either. It's a nice idea though.
 

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The ECM is what tells the light to come on. It monitors your driving habits. So for me it might come on when I have 2 gallons if I am a light foot. For a lead foot it will come on sooner in order to accomodate you.

In my BMW, there is a button that says range. It should give you the mileage that you are supposed to have before you fill up again. Last time it said 22 miles, and I ran out of gas. I also had a CEL. I imagine the light was from a misfire.

You have to keep in mind freeway and bumper to bumper driving.

Sometimes, I have a straight shot along a decent strip where I can get up to 55 (in my daily routine) and sometimes, I am driving down the busiest blvd in town. When you are freeway driving, the MPG are better by 1-3 gallons. So if you are on the freeway and it says you are at say 1/8 tank, then if you turn into town, you will actually be getting worse mileage after the turn off.

My new policy-Below 1/4 tank, just top off. It is safe that way, and much cheaper than a stuck injector.:)
 

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i havent really pushed my X before but i know on one of our work trucks its a 08 F-550 and it has the info dash that tells how far you can drive and i have had it down to like 2-3 miles to empty... then it took 38.5 gallons ( 39 gal tank ) and $175 latwer it said 410 miles to empty... now you can call that shitty gas milage..... ( its sitting in my driveway cause it has a full tank and i need to go places this weekend... )
 

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While this has been debated before, running your tank low and using every last drop doesnt get any more gunk than when a tank is full............. most deposits, sink to the bottom and most moderen tanks now have a "cup" the pump fits in it fills up and has a one way check valve so fuel can come in but not out... so when you do run your tank low its still submerged in fuel to keep cool...... and most modern fuel pumps have a long fine mesh screen that prevents the smallest particales from getting in your pump... and when you fill up it " washes" most of that off..... now from the old days when a pump did fail becuase of low tanks and before gas stations used three and four filter systems pumps failed alot more........... and ive gone 61 miles after the light came on. i had a 5 gallon jug of gas and wanted to find out what the range is.... when i finally pulled over for gas i put 19.1 gallons in... that was as full as i can get it, so no telling how much was left lol
 

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i go way lower than that all the time... it can go like below E alot... and it does not suck up junk when its low thats retarded.. the pump is on the bottom so its not like when it gets low its using the old nasty gas or something... it doesnt even matter and plus it does have a little screen around it..

like whenever you turn off your car.. look at were the needle sits.. thats how low it can get.
 

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It's not retarded. Some stuff is small and sits on top of the gasoline. When this stuff reaches that low then it can get into the pump.

Please do not say "that's retarded" to another person's idea. Thanks
 
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