How Far Can You Drive With The Tank On Empty?
Justin Davis is on a mission. He wants to know how far various cars will drive after the gas-tank warning light comes on. The auto manufacturers won't tell him. His solution? Ask the internet.
So, people of the tubes, you can help Justin and heck, help us all, by adding your knowledge to his website "Tank on Empty." The internet is so nifty sometimes. —MEGHANN MARCO
Tank On Empty [via Network World]
Post a comment
Comments:
ive driven an '87 honda prelude, '89 dodge caravan, '97 toyota camry, '01 toyota echo, & an '04 mazda3 -- all had right around 2 gallon reserves once the gas light came on.
so when the light comes on, a little quick math (mpg x 2), and i know thats as far as i should risk driving. i have never ever run out of fuel using this rule of thumb.
i have however over estimated how much fuel my vespa would suck down on cold rainy day & was left pushing it down the road to fill back up.
this post is likely to bring up the argument of running your tank that low & ruining the fuel pump, etc. always a fun topic!
3ZKL: excessive wear on the fuel pump is EXACTLY what this brings up. Most modern cars have an immersed pump in the gas tank that uses the pool of fuel around it for cooling. The more you run the pump with very little fuel in the tank, the more excess wear you put on the pump. It's good to have some idea in case the fuel light catches you by surprise on some lonely stretch of interstate highway, but in general it's best to keep some fuel in the tank a) so you have better options about where to stop and get fuel and b) to extend the life of the fuel pump that's almost sure to be an expensive pain in the ass to have replaced.
@homerjay: Dammit, homerjay! You beat me to this by three minutes while I looked up the episode number!
First: Uphill or dfownhill?
More important: I've been driving Toyotas for more than 10 years (mostly Camrys) and each car has had the same "peculiarity:"
The gas gauge takes forever to get from FULL to half-full. Then it speeds up slightly from half-full to EMPTY. I figure the top half is PR, and the bottom half touches reality.
Hey, that's marketing!
Dependable, reliable cars, though.
Here's a real story that has happened to my buddy... twice. He's a young guy, 25 years old at that time, never ever had a car before but had to purchase one in order to drive to work. One fine morning he leaves home and notices the "low fuel" light. He thinks "All right, I can drive as long as it's yellow. As soon as it turns red I'll stop at a gas station".
Needless to say he was late to work that morning.
My old '96 Buick Regal would go about 50 miles after the gas light turned on (at least 50 - I never actually tested it till the tank was dry). My current '01 Saturn SL2 tank holds 12.1 gallons and the empty light turns on when I have burned 10 gallons. It gets around 33-36mpg, so I could probably go at least 60 miles once the light turns on.
My '95 Rodeo LS (V6, high mileage, probably in need of tires and/or a tune up - I was young then) once got 37 miles on the highway after the light came on. It was making some funny noises as I rounded the corner into the gas station, I don't think I would have made it ten more feet.
I still miss that thing.
i can make it home, back to work & back home on a low fuel light comfortably (which is roughly 75 miles & LOTS OF HILLS). once, i pushed it to work - home - work - home, but i was dropping it in neutral every chance i had (& sweating a little).
oh, & don't forget to follow the reset rule...if the light goes off at any point, you've reset your reserve to full capacity.
I cannot be as exact as those who post before me, but here is my information:
1999 Ford Taurus. The light comes on three times - during the last quarter of the gallon the fuel gauge swings from empty back up to a quarter tank three times, going to stay on empty the third time, with the gas light coming on when it is on E. After it hits the third time I can get at least twenty more miles on it.
Another question, perhaps as important is, how accurate are the specs for gas tank capacity? If I fill up my tank as soon as the light comes on, and I notice that I have just put in 2 gallons less than my tank's specified capacity, if that spec matches real world (I usually fill my tank up as full as I can get it) then it's simple to deduce how much was left in the tank when the light came on. But I don't know how accurate those specs are.
most cars will take longer to get from full to half full and go faster from about half full to E.
This is because of the way your car measures the gas inside it. There's a little foam ball that floats on top of the gas and produces a reading. When the tank is completely full there's nowhere for the floater to go, so it stays stuck at the top of the tank until you use enough fuel for it to start to drop a little bit. It makes it seem like it's not moving from F even though you're consuming fuel.
Any rational thinking person will tell you that it is simply ludicrous to participate in this 'experiment'.
a) The data obtained is highly questionable since the milage depends on many factors such as condition of the car, individual driving style, weather conditions, terrain etc.. This could mean that a well maintained car, driven by a grandma Ethel in sunny weather in Florida (even terrain) gets (for example) 60 miles and a badly maintained car (of the same make, year, and model), driven by road-rage-rambo in a blizzard through the blue range mountains gets only 22 miles.
b) Can you say, sing, or yodel 'Dangerous'? Anybody participating in this 'experiment' needs to understand that at some point his/her engine will stall. If that happens on one of the middle lanes of the Interstate, in dense city traffic, in the middle of the night on a rural road, (I could go on and on) well, let's just say you are putting your life at risk.
My personal tip is: Never let your gas get below the 1/3 mark, especially not if you live in an area where you could have natural disasters strike at any time (e.g. Florida during hurricane season, Tornado-Alley, North East in the winter months etc.). If you get into that habit you avoid the added danger and the lovely smell of a gasoline reserve canister in your trunk.
But then, I am not a big adventurer I guess...
Replacing fuel pumps inside the gas tank is labor intensive. My family owns a Windstar (I don't know the year). Shortly after we bought it my dad drove for less than a mile with the fuel light on and burned up the pump. They have to remove the tank to get inside, so it cost us $400.
I'm guessing the ridiculously short warning is a fault specific to our vehicle and has something to do with its unreliable gas gage. But now we estimate the remaining gas by tracking distance with the odometer. And if the fuel light comes on we pull over immediately.
So for the Ford Windstar, I'll say you can drive 3000 feet after the fuel light comes on.
It depends if you are highway or city driving, and whether your car is facing uphill, downhill, or level.
Based on my own cars, I've learned that tank capacity ratings are not accurate. I have run out of gas quite a few times and subsequent fill-ups have never been more than about 8.5 out of a 10.2 rating.
@kweee: Yeah, I get 150 miles from the light in my 2002 Civic. I usually fill shortly after the light comes on. I usually need 10-11 gallons. The tank capacity is 14 gallons. I usually get 38-40 MPG.
The light comes on between 4 and 3 gallons left. Estimating conservatively at 35MPG, there should be 105-140 miles from when the light comes on.
If anybody took the time to read some of their manuals, it usually tells you how many gallons are left before the low fuel light (mine says 2.5 gallons). Then you can take the lowest estimated MPG from your sticker to figure out your minimum number of miles you can go when the light comes on.
Older cars (pre 1995) were never standardized like they are today, so you may be out of luck in the next 10 minutes when it does come on.
I have a friend who tests this out every time he gets a new car (new to him - he only buys used). He puts a gas can with a few gallons in the trunk, then drives the car until it stalls out, keeping track of when the "low fuel" light goes on. Then he pours the reserve gas in and gets to a gas station.
I have a 2000 Honda Civic DX and my experience is similar to Troy F.'s. The specs on the car show the gas tank as 13.6 gallons. Even with the low fuel light on it has never taken over 11 gallons to fill the tank. I average about 30mpg/city, so that gives me about a 80 mile cushion.
So, here's how you estimate how far you can go with the gas light on:
1) Look up the size of your car's gas tank.
2) Drive car until low fuel light comes on.
3) Note how much it takes to fill up the tank, subtract from tank capacity, and multiply the remainder times average MPG.
4) Then, if it were me, I would take the product I just came up with and divide it in half. No sense in pushing your luck that far if you don't have to.
@cnc1019: Agreed 100%. RTFM, people! It will tell you that the warning light turns on when x gallons are left. How can there be an entire website dedicated to a guessing game when the same information is already available in the vehicle's owner's manual? It's not like this is undisclosed or proprietary information -- at least 5 brands that I know of that have this information in the manual (Nissan, Chrysler, Subaru, Porsche, and now Mitsubishi). Are we all just stupid or what? :/
@alhypo: I was about to say something similar. In general your going to have a gallon or two extra after the light illuminates. This will give you 20 to 40 miles, enough to get to the nearest gas station, which is what you should do. My wifes car had a bad fuel gauge, so I totally drained the tank once. I thought it was just running bad and stalling out on me, but I did get 2 miles on "fumes." The moral of the stroy here was I had to drop the tank and replace the pump. This can be a lot of work if you do it yourself, or as alhypo found out, pretty damned expensive if you can't.
I have a '00 Ford Explorer Sport 4x4 and it gets about 17 mpg. The light comes on and you have about 2 gallons in the tank. So that is about 34 miles. I've gone 20 miles after the light came on and it held right 16+ gallons when I filled up. It was scary as heck because I was in Atlanta at the time.
By the way ~ folks at Ford: it is a GAUGE not a GAGE. No wonder the Japs are beating your pants off in the automobile market. You can't even spell basic instruments.
I was on the freeway south of Des Moines once on my way to the airport to pick up family when I missed my exit and wound up having to drive another ten miles outside of town before I could turn around, then that same ten miles back into town, followed by driving through the south side of Des Moines to get into the airport itself. I was driving an Expedition (monster SUV), and the tank was on the orange Empty line the entire time, but I managed to make the full 20+mile drive without running out. My '95 Taurus is really indecisive on when the Low Fuel light comes on; I can have a fourth tank left when it'll pop on, and other times it won't show up until I'm just barely above the Empty line.
Not wanting to explode myself welding around the gastank on my 97 Jeep Wrangler, I decided to pull out the tank before I started welding. Not wanting to drag a full tank out into the yard, I drove it until nearly empty. The gas light came on at work, and I drove 25 miles home. After pulling the tank it seemed like there was at least another half gallon sloshing about in the bottom. This was on mostly flat ground in 2WD running about 60 mph.
Based on this, and coasting into the gas station in my Nissan Sentri, I wouldn't drive much over 20 miles with the fuel light on. My guess is 30 is about the max.
@Amarain824: When my '98 Escort's light is on I have 60 miles left (freeway) 50 in the city. It has a 2 gallon 'reserve.'


























I was JUST asking myself the same question yesterday. I was told that VW Jettas will last about 30 miles with the gaslight on, but mine is Turbo and I wonder if the same rule applies. I got nervous after about 5 miles and filled up.
My mother has a Saab that tells you how many miles you have left before you run out. I wonder how accurate that is?
I guess the only way to know for sure would be to drive around until you run out of gas. No thanks.