Car running while filling it....

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mrSHEiK124

Lifer
Mar 6, 2004
11,491
2
0
Originally posted by: supafly
FWIW my friend fills up his truck (diesel) while it's running. He says it's safe to do it with diesel.

Diesel fumes =! flammable
Yes, it is safe
 

Shyatic

Platinum Member
Apr 5, 2004
2,164
34
91
Okay whoever things an "explosion" is going to happen is smoking something. The reason for this is back in the 70s, the pumps were not powerful enough to push the fuel down because there was backwards pressure from the fuel tank. And to boot, you'd kind of have to gauge it manually because the old style pumps didn't "click" in properly and there was plenty of overfilling and ie, spillage.

Nowadays that's about all that can happen -- the back pressure in the gas tank can cause an air bubble and the gas will overflow even if the car is dead empty. My habit lately has been to stop the car, rev the engine a bit and turn it off while revving. This pushes all the exhaust gases out and makes sure the gas tank doesn't get a bubble in the fuel line as you're fueling.

Nothing will happen if you leave your car on though. 99 times out of 100 you will have no air bubbles, it's that 1 time that you'll just get irrritated and have to sit there with your finger in the tank while it lets the air out
 

jagec

Lifer
Apr 30, 2004
24,442
6
81
Originally posted by: spidey07

What if there is something faulty with the car's electrical system? That law is there for a reason and not some inconvience.

You must be inexperienced with the legal system

What fault in the car's electrical system could possibly allow you to DRIVE to the gas station, and then explode the second you start pumping? That's not the real reason for the law. It's a "just-in-case" law, really. It keeps people from stealing cars while their owners are pumping, and it keeps the total bimbos from starting to fill up the car, getting back in, and then realizing that they want to go to the hairdresser's and driving off while the nozzle is still in their tank and pumping.

Originally posted by: mrSHEiK124
Originally posted by: supafly
FWIW my friend fills up his truck (diesel) while it's running. He says it's safe to do it with diesel.

Diesel fumes =! flammable
Yes, it is safe

We used to light fires with diesel all the time.

less flammable than gasoline is NOT the same thing as inflammable.
 

Matthias99

Diamond Member
Oct 7, 2003
8,808
0
0
Originally posted by: jagec
Originally posted by: mrSHEiK124
Originally posted by: supafly
FWIW my friend fills up his truck (diesel) while it's running. He says it's safe to do it with diesel.

Diesel fumes =! flammable
Yes, it is safe

We used to light fires with diesel all the time.

less flammable than gasoline is NOT the same thing as inflammable.

Diesel fumes != flammable. You can put out cigarettes in diesel fuel (can also be done, carefully, with cold gasoline; kids, don't try this at home.) Having a spark anywhere near open gasoline can cause the vapor to ignite.

Diesel fuel is hard to burn compared to a lot of other substances (like gasoline or ethanol). Diesel engines ignite the fuel via compression, and need glow plugs to heat it up first when it's cold.

As for 'no car running while fueling'? Vibration causing a spark between the tank and dispenser is a possibility, but my money's mostly on people leaving the thing in gear and/or driving off. IMO, it seems very unlikely to start a fire unless something is really wrong with your electrical system.

What annoys the hell out of me is states (like mine) that don't allow the fuel pumps you can latch so they'll fill handsfree... it's frickin' cold in Massachusetts in the winter!

Someone pulled up behind me a while back and was filling their car while it was running. I mentioned it to them; I got a dirty look, but then they turned it off. It does say on the pumps to turn off your engine...
 

mrSHEiK124

Lifer
Mar 6, 2004
11,491
2
0
Originally posted by: Matthias99
Originally posted by: jagec
Originally posted by: mrSHEiK124
Originally posted by: supafly
FWIW my friend fills up his truck (diesel) while it's running. He says it's safe to do it with diesel.

Diesel fumes =! flammable
Yes, it is safe

We used to light fires with diesel all the time.

less flammable than gasoline is NOT the same thing as inflammable.

Diesel fumes != flammable. You can put out cigarettes in diesel fuel (can also be done, carefully, with cold gasoline; kids, don't try this at home.) Having a spark anywhere near open gasoline can cause the vapor to ignite.

Diesel fuel is hard to burn compared to a lot of other substances (like gasoline or ethanol). Diesel engines ignite the fuel via compression, and need glow plugs to heat it up first when it's cold.

As for 'no car running while fueling'? Vibration causing a spark between the tank and dispenser is a possibility, but my money's mostly on people leaving the thing in gear and/or driving off. IMO, it seems very unlikely to start a fire unless something is really wrong with your electrical system.

What annoys the hell out of me is states (like mine) that don't allow the fuel pumps you can latch so they'll fill handsfree... it's frickin' cold in Massachusetts in the winter!

Someone pulled up behind me a while back and was filling their car while it was running. I mentioned it to them; I got a dirty look, but then they turned it off. It does say on the pumps to turn off your engine...

Hehe, thanks, you saved me the work of pointing out that I said fumes and not diesel itself.
 

manowar821

Diamond Member
Mar 1, 2007
6,063
0
0
Cellphones cannot start fires at the gas station, why do people still talk like they do?
I know that a running car, and static from your car seat CAN start fires, though.
 

GasX

Lifer
Feb 8, 2001
29,033
6
81
The thing about internal combustion engines is that the combustion is INTERNAL.

The risk of anything happening are infintesimal, however the outcome of an "event" would be fairly catastrophic so...
 

LS20

Banned
Jan 22, 2002
5,858
0
0
same reason they dont want your laptop or mp3 players on while a plane is taking off, or cell phone will theyre in the air.

realistic danger? nope
 

fisheerman

Senior member
Oct 25, 2006
733
0
0
No way to start a fire with the engine running at a gas pump this is complete bs. Back in the day, cars had carburators that could cause a backfire and catch things on fire but it was rare.

The laws are there because they are old and there is noone wanting to get rid of them. They post all of this stuff and everyone goes nuts "Youll blow yourself up"

Cell phones will not do it either.....it has never been proving just theoritical (mythbusters tried and they ended up having a arc in pure gasoline vapors 10 times what the worst cell phone could imit and it didn't do anything) .

The car being left in gear is a bigger reason to be concerned.

another stupid law!

-fish
 

fisheerman

Senior member
Oct 25, 2006
733
0
0
Originally posted by: RiverDog
Diesel fuel does burn, I use it in my oil furnace.

but you have to have a pilot light already burning in order to get it started........

it takes a hot flame to start diesel fuel.

 

Softballslug

Senior member
Feb 22, 2000
397
0
0
Originally posted by: Jawo
Running your car while filling up is just stupid....not much gas, or fumes + short in car/something else nearby for carboom

And yest he cellphone thing has happened...can't find the article now.....

Then we need to put the pumps in such a location so that NO ONE can DRIVE BY while your filling up!!!!!!

 

Kelemvor

Lifer
May 23, 2002
16,930
7
81
Most gas pumps now have a vapor recovery system built in that sucks up the gas fumes so there really is no danger these days in all practical purposes. But they still have signs telling you to turn off the car and stop using your cell phone and everything but it's more just leftover from reasons from years ago. Kind of like the idea to change your oil every 3000 miles. Can't teach an old dog new tricks.
 

LordMorpheus

Diamond Member
Aug 14, 2002
6,871
1
0
Originally posted by: deepred98
sparks therefore fire or explosions

Any fumes dense enough to burn/explode will have an overpowering smell. In addition, any cloud of fumes dense enough to explode almost certaily will regardless of whether your car is on or not, or your phone is on or not. Think of all the sparks flying around in the car next to yours starter motor when he turns it on to leave . . .
 

jiggahertz

Golden Member
Apr 7, 2005
1,532
0
76
Originally posted by: Matthias99
Originally posted by: jagec
Originally posted by: mrSHEiK124
Originally posted by: supafly
FWIW my friend fills up his truck (diesel) while it's running. He says it's safe to do it with diesel.

Diesel fumes =! flammable
Yes, it is safe

We used to light fires with diesel all the time.

less flammable than gasoline is NOT the same thing as inflammable.

Diesel fumes != flammable. You can put out cigarettes in diesel fuel (can also be done, carefully, with cold gasoline; kids, don't try this at home.) Having a spark anywhere near open gasoline can cause the vapor to ignite.

Diesel fuel is hard to burn compared to a lot of other substances (like gasoline or ethanol). Diesel engines ignite the fuel via compression, and need glow plugs to heat it up first when it's cold.

As for 'no car running while fueling'? Vibration causing a spark between the tank and dispenser is a possibility, but my money's mostly on people leaving the thing in gear and/or driving off. IMO, it seems very unlikely to start a fire unless something is really wrong with your electrical system.

What annoys the hell out of me is states (like mine) that don't allow the fuel pumps you can latch so they'll fill handsfree... it's frickin' cold in Massachusetts in the winter!

Someone pulled up behind me a while back and was filling their car while it was running. I mentioned it to them; I got a dirty look, but then they turned it off. It does say on the pumps to turn off your engine...

I can't stand this. I'll usually shove an empty water bottle in the handle or something so I don't have to babysit the pump.
 

Jeff7

Lifer
Jan 4, 2001
41,599
19
81
Originally posted by: Kelemvor
Most gas pumps now have a vapor recovery system built in that sucks up the gas fumes so there really is no danger these days in all practical purposes. But they still have signs telling you to turn off the car and stop using your cell phone and everything but it's more just leftover from reasons from years ago. Kind of like the idea to change your oil every 3000 miles. Can't teach an old dog new tricks.
Really? Maybe in your state. I'm in Pennsylvania, and I have never seen anything with a vapor recovery system - the gas vapor coming out while refueling is dense enough that it produces very visible distortions in the air.
 

RiverDog

Senior member
Mar 15, 2007
409
0
0
Originally posted by: Jeff7
Originally posted by: Kelemvor
Most gas pumps now have a vapor recovery system built in that sucks up the gas fumes so there really is no danger these days in all practical purposes. But they still have signs telling you to turn off the car and stop using your cell phone and everything but it's more just leftover from reasons from years ago. Kind of like the idea to change your oil every 3000 miles. Can't teach an old dog new tricks.
Really? Maybe in your state. I'm in Pennsylvania, and I have never seen anything with a vapor recovery system - the gas vapor coming out while refueling is dense enough that it produces very visible distortions in the air.

www.pabulletin.com/secure/data/vol29/29-15/584.html - 32k

Pa has had vapor recovery rules since 1998 for a lot of the stations. I see these systems nearly every time i fill up.
 

RiverDog

Senior member
Mar 15, 2007
409
0
0
Originally posted by: Jeeebus
What if the car was on a treadmill while filling up?

Somebody would use their cell phone to report it and everything would explode!
 

torpid

Lifer
Sep 14, 2003
11,631
11
76
Better question... why would anyone leave it running? Leaving your car running while filling up the gas tank is self-defeating, because you are wasting gas. The only reason I can think to do it is if your car was just jump started, or your family is in the car and really likes the britney song playing on the radio.
 

mobobuff

Lifer
Apr 5, 2004
11,100
1
81
Originally posted by: torpid
Better question... why would anyone leave it running? Leaving your car running while filling up the gas tank is self-defeating, because you are wasting gas. The only reason I can think to do it is if your car was just jump started, or your family is in the car and really likes the britney song playing on the radio.

Where do you live, just out of curiousity.
 
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