Do you top off?

[OICU812]

Strange weird pointless thread really...just sayin..

[N1rve]

Never.

I stop it at the first click.

Here's something from the EPA Site.

In areas of ozone nonattainment, gas station pumps are equipped with vapor recovery systems that feed back gas vapors into their tanks to prevent vapors from escaping into the air and contributing to air pollution. Any additional gas you try to pump into your tank may be drawn into the vapor line and fed back into the station’s storage tanks.

http://www.epa.gov/donttopoff/

So save yourself some money.

[michaelosx]

I just fill up the tank. I thought this poll was trying to see if people save weight by keeping less fuel in the tank, thus improving mileage/performance.

[SuperDave]

Originally Posted by mitosis

Never EVER. Some stupid Oregonian gas station attendant broke the float or sensor in the tank on my Fit from topping off. Now the needle reads way off and the car is puffing on fumes by the time it reads 1/4 tank and it dies completely shortly there after.

I know that it was caused by topping off because the needle was always very accurate until the first time my tank got topped off by this lady. It was on that very tank that I experienced running the car dry for the first time, looked down at my gas gauge in confusion as I was stalled out on the side of the road and it was reading barely a needle's width under the 1/4 mark.

I ALWAYS (like clockwork) stop at the click for the sake of consistent MPG calculations so I had never topped the car off before, and it was my first time going to Oregon so I didn't know that all the gas station attendants like to top off the tank in order to make easy change by going to the next whole dollar amount. What is with that? Apparently the moment I cross the border I'm an infant who is incapable of pumping his own gas?

I have since figured out that I need to tell the attendant "fill it only to the click, don't top it off" every time I get gas in Oregon, but ugh... talk about a rude welcome to your state. "Oh hi, welcome to Oregon. Here let me break your gas tank for you!" Definitely gave me a bad first impression of the state.

yo, fuck oregon gas station attendants!

[racecat]

Originally Posted by OICU812

Strange weird pointless thread really...just sayin..

Actually, looks like it's not so pointless. Seems like there's some good information being given here.

I didn't know the details on why it was a bad idea, but I've never done it anyway. I'm satisfied with the click.

[Carlitoz3]

I guess since we are on the subject: Credit Card or Cash??

I usually pay cash so I won't go over board.

[Vincenttam]

Would you force your child to finish their food when they're already full?? My auto professor always told us it was a terrible idea to top off. The site of it is unappealing to me as well =/

[CruiseZen]

I don't top off the tank in my cars but often do in my 4 Runner. For some reason the 4 Runner will cause the pump to turn off well short of a full tank. (About 3/4 of a gallon short) I've got 171,000 miles on the 4 Runner and have never had any problems with topping the tank off.

Also another thing to consider, especially in hot weather, is thermal expansion of the gas in your tank. Underground in the storage tank, the temperature of the gas is likely near 52 degrees. Once it is in your tank it will warm up to air temperature and gasoline will expand as it warms. This shouldn't be a problem if you continue to drive your car for awhile after your fill up. However, if you fill up and top off right before parking the car it could cause some of the problems others on this thread have talked about.

[ericmpena]

I used to, until I found out the extra gas is probably going right back into the stations tanks. In the long run that's a lot of wasted money.

[Basket Case]

Originally Posted by tommy

I've always assumed doing so could force fuel into the evap vent tube which is somewhere near the top of the tank. I can't imagine that would be good for the shut valve or the canister.

One of my science teachers when I was in high school ( I went to a gifted school with great teachers so I actually trust this guy) told us then when you do that you are wasting your money since the eval system catches most of it and you don't get the extra fuel. IDK, he was a great teacher and was always on the money s I tend to trust this guy, even years later when I independently verified some stuff.

[zenki_levin]

Originally Posted by sprintertrueno86

Full service stations sometimes top off.

Self serve, I never top off but I always shake the gas nozzle furiously to get that last drip of gas in to my tank.

Lol i thought i was the only one who did that. Sometimes gets me strange looks from onlookers.

[marky]

Nope never.. I like to keep light weight lol.. full tank= lower mpg=aka heavy.. but I have a heavy foot sometimes

[Calavera]

In my 20s topped off all the time but did not shake. Now in my 30s never top off but do shake the crap out of it. Nothing worst then to pull out and make a mess - no sexual pun intended!


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[Luis_GT]

I always top off to the nearest .x0 or .x5