pumping gas slowly? - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 04-13-2008, 09:32 PM   #1
Registered Member
 
Join Date: Apr 2007
Posts: 336
Country: United States
pumping gas slowly?

when i pump gas, i usually pump it very slowly, then set it at the lowest spot on the 'click' thingee and just let it pump until it clicks, then record the amount of gas


is this a better way than pumping it faster? i think when it pumps faster, once the nozzle clicks and stops fuel, the meter might still be running a fractiion of a second longer.
__________________

civic94 is offline   Reply With Quote
Old 04-14-2008, 04:20 AM   #2
Registered Member
 
Join Date: May 2007
Posts: 200
Country: United States
Are you concerned about the few pennies ( penny ) that you would save, or the accuracy of the amount of gas that is displayed ?

I try to pump slowly because of the way that the nozzle will shut off before the tank is trully full. When you pump fast, the fuel sloshes around, and from what I have read, this can cause the pump to shut down when it gets hit by the fuel that is splashed upwards on an unfull tank.
__________________

Nerds laugh at me is offline   Reply With Quote
Old 04-14-2008, 04:52 AM   #3
Senior Member
 
Join Date: Jul 2010
Posts: 120
Country: United States
Location: Elgin, IL
I use the fast position until it clicks off, count to ten, then put it on the slow position until it clicks off, I then bring it up to the nearest $.10.
ihatemybike is offline   Reply With Quote
Old 04-14-2008, 06:55 AM   #4
Registered Member
 
93dagsr's Avatar
 
Join Date: Nov 2007
Posts: 103
Country: United States
Quote:
Originally Posted by ihatemybike View Post
I use the fast position until it clicks off, count to ten, then put it on the slow position until it clicks off, I then bring it up to the nearest $.10.
i do the same!
__________________


http://consumerguideauto.howstuffwor...onda-civic.htm

stupid ricer... useless wings are for pinguins!
93dagsr is offline   Reply With Quote
Old 04-14-2008, 07:08 AM   #5
Registered Member
 
JanGeo's Avatar
 
Join Date: Jan 2006
Posts: 2,442
Country: United States
Send a message via Yahoo to JanGeo
According to a petrolium expert if you pump slowly the gas liquid entering your tank does not evaporate as much and get sucked back into the pump nozzle taking back what you just pumped. Apparently "he" thinks that it can be a significant amount of fuel - he also recommends filling up after a cold night so you get colder gasoline from the underground tanks which is more dense thus getting more molecules per gallon volume. As far as getting the tank full the only full tank is one that you can see the gasoline in the filler hole. Any other method is relying on the flow rate of the fuel going down the filler neck and the ability of the air to vent form the tank as you are filling it.
JanGeo is offline   Reply With Quote
Old 04-14-2008, 12:48 PM   #6
Registered Member
 
kamesama980's Avatar
 
Join Date: Nov 2007
Posts: 742
Country: United States
Location: Columbus, IN, USA
Send a message via AIM to kamesama980 Send a message via Yahoo to kamesama980
Quote:
Originally Posted by JanGeo View Post
...he also recommends filling up after a cold night so you get colder gasoline from the underground tanks which is more dense thus getting more molecules per gallon volume...
So.... if permafrost in the midwest goes down like 2 feet over the season, hows the gas in the tank 10 feet below ground gonna change temps noticeably overnight?
__________________
-Russell
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"
kamesama980 is offline   Reply With Quote
Old 04-14-2008, 12:59 PM   #7
Registered Member
 
JanGeo's Avatar
 
Join Date: Jan 2006
Posts: 2,442
Country: United States
Send a message via Yahoo to JanGeo
Well first the take TOP is not 10 feet under the ground and the frost line is where the ground FREEZES. It still gets cold deeper down since the top of the tank is not that far below ground. I also think that the delivery truck is getting cooled off if it travels in cold weather getting from the terminal to the station. I guess we REALLY NEED TO MEASURE THE GAS TEMPERATURE when we fill up our tanks!
JanGeo is offline   Reply With Quote
Old 04-14-2008, 01:10 PM   #8
Registered Member
 
JanGeo's Avatar
 
Join Date: Jan 2006
Posts: 2,442
Country: United States
Send a message via Yahoo to JanGeo
I had some really warm gas come out of a pump in PA once and if you feel the hose as you pump the fuel as I sometimes do it is pretty cold. Tell you all what . . . I am on empty now so when I go for gas in the next day or so I will bring my IR Temp probe with me and measure the fuel line on the pump as I fill it and check the ground temp around the tanks too and see what kind of numbers I get. Next we will need fuel temp reading in the gas log?
JanGeo is offline   Reply With Quote
Old 04-14-2008, 01:29 PM   #9
Registered Member
 
bowtieguy's Avatar
 
Join Date: Oct 2008
Posts: 1,873
Country: United States
Location: orlando, florida
i believe pumping slowly does help by retaining more gas in the tank. Brucepick theorized that it keeps the gas from sloshing around in the tank possibly allowing for a more complete fill(at least more accurate to the pump).

it's a pretty cheap test, costing only a bit extra time to fill. during my first slow fill, my FE(calculations) dropped as perhaps more fuel was retained to divide by miles. afterwards, my #s returned to an "above" normal.

so, in theory, if i tried a normal(quick) fill, the #s should be above normal. i say normal(and i can) because i drive the same miles, use the same gas and pump, dive the same speed, etc EVERY week. the only exception is when noted, be it vacation miles or what not. maybe someone else could try this as i do not want to take a hit on FE.
bowtieguy is offline   Reply With Quote
Old 04-14-2008, 01:37 PM   #10
Registered Member
 
civic lover's Avatar
 
Join Date: Oct 2007
Posts: 123
Country: United States
Quote:
Originally Posted by JanGeo View Post
- he also recommends filling up after a cold night so you get colder gasoline from the underground tanks which is more dense thus getting more molecules per gallon volume. As far as getting the tank full the only full tank is one that you can see the gasoline in the filler hole. Any other method is relying on the flow rate of the fuel going down the filler neck and the ability of the air to vent form the tank as you are filling it.
I read some where that Canada actually has meters in the gas station to adjust for the temperature since on average it is colder there than it is warmer. If they didn't adjust for it then the consumer would benefit over time. In the U.S. though since we have more warm days than cold on average they don't adjust for it. The gas stations are winning here. I wish I could find that article. Hope it makes sense.
__________________

civic lover is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Matching EPA Type to My Car DastardlyDan Fuelly Web Support and Community News 2 10-26-2009 07:16 AM
Hydrogen or H2O Systems 1Jal1 General Fuel Topics 4 10-11-2008 02:20 AM
Another new guy? dancincartman Introduce Yourself - New member Welcome 6 08-17-2007 09:03 PM
An American Perspective on Driving in Canada rh77 General Discussion (Off-Topic) 28 03-24-2006 10:42 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 07:19 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.