Pumping Slowly - Fuelly Forums

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

Reply
 
Thread Tools Display Modes
 
Old 11-21-2007, 04:59 PM   #1
Registered Member
 
bowtieguy's Avatar
 
Join Date: Oct 2008
Posts: 1,873
Country: United States
Location: orlando, florida
Pumping Slowly

pumping gas slowly, does it have FE benefits?

got the idea from Brucepick. anyway, in theory, pumping gas slowly prevents vapors from escaping resulting in more gas retained.

the first time i did this, my FE went down significantly. IF more gas is retained, this makes sense via more gal to divide into miles. next fillup would balance the #s right?

this IS what happened to me. got ~30mpg before the test w/ VERY favorable conditions. then, pumped slowly to~25. next fillup, again slowly, got 29+. both were less favorable, but VERY similar miles, w/ the only variation being my lower grill block. it came off during both "trips," the latter being repaired(replaced)permanently. oh yes, and one extra day to work(mostly hwy) on the 2nd. that can't be worth 4mpg tho.

this IS very preliminary, but what do you think?
__________________

bowtieguy is offline   Reply With Quote
Old 11-21-2007, 05:02 PM   #2
Registered Member
 
Join Date: May 2007
Posts: 447
Country: United States
Quote:
Originally Posted by bowtieguy View Post
pumping gas slowly, does it have FE benefits?

got the idea from Brucepick. anyway, in theory, pumping gas slowly prevents vapors from escaping resulting in more gas retained.
at first, I thought I was on the wrong forum!
__________________

__________________
slurp812 is offline   Reply With Quote
Old 11-21-2007, 06:12 PM   #3
Registered Member
 
skewbe's Avatar
 
Join Date: Jan 2007
Posts: 771
Country: United States
It might be that pumping slower means the fuel foams up less and you can get more in the tank before it clicks off. Getting more gas in the tank would make it seem like you got worse mileage. Can't say for certain that is what is happening though as one tank isn't enough to go on.
__________________
Standard Disclaimer
skewbe is offline   Reply With Quote
Old 11-21-2007, 07:17 PM   #4
Registered Member
 
JanGeo's Avatar
 
Join Date: Jan 2006
Posts: 2,442
Country: United States
Send a message via Yahoo to JanGeo
Usually pumping slowly will get you more fuel from it leaking around the metering system in the pump - the amount of fuel vapors that come out of the tank while filling is next to nothing. Today when I got gas I usually pump slow for the last gallon into the tank because it foams up so much and when I did the pump did shut off then the gas over flowed - I still put in another $2.00 work of gas after it overflowed - sure wish there was a better way to get the gas in with it not spilling and still fill the tank up.
JanGeo is offline   Reply With Quote
Old 11-22-2007, 05:09 AM   #5
Registered Member
 
bowtieguy's Avatar
 
Join Date: Oct 2008
Posts: 1,873
Country: United States
Location: orlando, florida
it seems as tho more gas is making it into my tank. this is in observation of how much is pumped in relation to what the gauge reads.

again, it is very preliminary but, consider this: without exception, since adding mods(hypermiling), the gauge reads ~1/4 tank as i near 300miles. the last fillup was 341miles and the gauge read ~1/2.

i realize gauges are not perfectly accurate, but it is interesting. so, as testing continues, time will tell.

will try testing this on my wife's car as well. scangauge compatible
unfortunately, she doesn't drive as consistant miles as i do.
bowtieguy 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
Fabia RS - Wrong! Kryptix Fuelly Web Support and Community News 7 10-26-2010 11:17 AM
Small problem with the 'recently' section and UK MPG DarkBahamut Fuelly Web Support and Community News 1 01-27-2009 02:11 AM
Retire a Vehicle pb Fuelly Web Support and Community News 1 11-11-2008 04:30 PM
suggestion for stat comparison zahampton Fuelly Web Support and Community News 1 09-04-2008 08:29 AM
IST = inertia storage transmission onegammyleg General Fuel Topics 3 12-17-2006 02:27 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 03:52 PM.


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