R56 Running gas tank near empty
#1
Running gas tank near empty
All,
Picked up my 2007 Mini in March. Named him Jagr. Pure fun to drive.
I know it's not wise running near empty. In a situation the other day I ran it down until the OBC said I could go 20 miles more before I found a place to fill up. It was scary but answered my question of how low can I go on gas. Mind you , I did not do it on purpose.
I just thought I'd let you know that in an emergency it can go that low.
Finally took a few pics.
Picked up my 2007 Mini in March. Named him Jagr. Pure fun to drive.
I know it's not wise running near empty. In a situation the other day I ran it down until the OBC said I could go 20 miles more before I found a place to fill up. It was scary but answered my question of how low can I go on gas. Mind you , I did not do it on purpose.
I just thought I'd let you know that in an emergency it can go that low.
Finally took a few pics.
Last edited by jrebel; 05-30-2007 at 06:09 PM. Reason: Adding Pic
#4
#5
Once or twice is probably no big deal. I sure wouldn't do it regularly. The pump is immersed in the fuel, and the fuel cools the pump when it's running. If you start running too low, the pump will get warm then hot. That's bad for longevity. Do it often enough and the pump will fail early. That's an expensive repair.
#7
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#9
True, but once the pump is no longer pumping, the car is no longer running! So it's a bit of a moot point.
#10
Once or twice is probably no big deal. I sure wouldn't do it regularly. The pump is immersed in the fuel, and the fuel cools the pump when it's running. If you start running too low, the pump will get warm then hot. That's bad for longevity. Do it often enough and the pump will fail early. That's an expensive repair.
If it's the fuel passing through the pump that cools it, then there's no need for concern - as 911Fan pointed out, as soon as the cooling flow of fuel stops, so does the pump.
#11
#13
I don't agree.
The "fuel pump" is an assembly-motor and pump. The actual liquid pump part of the assembly may have fuel going through it, but the electrical motor wouldn't. The motor would have to be cooled externally. I've had several go bad and had them apart on different vehicles (I fix them myself so see them firsthand). The motor is lightweight, and there's no where else for the heat to go. It's not designed to get enough cooling dumping to ambient atmosphere if it's not in liquid. No cooling fins or anything, lightweight metal motor body, won't transfer heat across to the actual pump part. Looks a lot like a motor in a toy.
(a few quick google results)
http://www.carx.com/AutoRepairandSer...1/Default.aspx
http://www.athomemechanic.com/archiv...your_fuel.html
http://www.popularmechanics.com/how_...36.html?page=2
http://www.donsautomotive.com/urbanlegends.html
If you continually run low tanks, you'll also have more condensation inside the tank. More water in the fuel isn't good either.
The "fuel pump" is an assembly-motor and pump. The actual liquid pump part of the assembly may have fuel going through it, but the electrical motor wouldn't. The motor would have to be cooled externally. I've had several go bad and had them apart on different vehicles (I fix them myself so see them firsthand). The motor is lightweight, and there's no where else for the heat to go. It's not designed to get enough cooling dumping to ambient atmosphere if it's not in liquid. No cooling fins or anything, lightweight metal motor body, won't transfer heat across to the actual pump part. Looks a lot like a motor in a toy.
(a few quick google results)
http://www.carx.com/AutoRepairandSer...1/Default.aspx
http://www.athomemechanic.com/archiv...your_fuel.html
http://www.popularmechanics.com/how_...36.html?page=2
http://www.donsautomotive.com/urbanlegends.html
If you continually run low tanks, you'll also have more condensation inside the tank. More water in the fuel isn't good either.
#15
The first time I filled Romi, I was not sure when would be a good time to fill her, so when she complained at 2 candy corns, I immedaitely pulled into a station and refuled. She took 12.1 gallons U.S. I recall the compture saying she had 80 miles left to go before being empty.
Assuming this was based on the AVG CON, which was 26.2, she had about 3 gallons left. So she carries just over 15 gallons of fuel, if the computer is correct.
I will let this second tank run down to the same point and refill at the same pump to see if it is consistent.
Assuming this was based on the AVG CON, which was 26.2, she had about 3 gallons left. So she carries just over 15 gallons of fuel, if the computer is correct.
I will let this second tank run down to the same point and refill at the same pump to see if it is consistent.
#17
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#19
Heck, that is nothing. . . I've had it display the --- and then start counting back up for a few miles. . .
#24