When filling up today to check my mileage I had an issue. - Fuelly Forums
Go Back   Fuelly Forums > Tech, Troubleshooting and Repair > Experiments, Modifications and DIY
Search Today's Posts Mark Forums Read
Thread Tools Display Modes
Old 06-12-2008, 04:48 AM   #1
Registered Member
HondaTorneoSiR's Avatar
Join Date: Jun 2008
Posts: 25
Country: United States
When filling up today to check my mileage I had an issue.

OK, I went to fill up and check out what my mileage was after using the P&G and EOC techniques. When I put the pump into my gas tank it stopped at .5 gallons and wouldn't discharge anymore gas. I thought that it was the pump so I held it back some until it would allow it to pump the gas in. I was able to get 2.66 gallons total in and it was topped off to the fill tube. I don't do this that often I was just caught off guard by the whole situation.

My question I guess would be is it logical that I only burned .5 gallons? I mean, I was able to squeeze 2.66 gallons into the tank albeit overfilled. I am trying to maintain my fuel log and this throws a huge wrench into things. I mean is it possible that I almost got 80mpg in 100% city driving?


GT "Avalanche 3.0" Bicylce: Miles 166.9
Honda Torneo Ave MPG 22.03

Total Cost w/ equip: $630.00
Gallons of Gas saved: 7.93
Total savings so far@4.06: $32.2

Balance... $597.80
HondaTorneoSiR is offline   Reply With Quote
Old 06-12-2008, 05:57 AM   #2
Registered Member
theholycow's Avatar
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
You can't get accurate readings from 40 miles of driving; you need more miles to get accurate, reproducible results. If you check your average every 40 or 50 miles you'll see wild huge fluctuations and you'll never know what worked. Besides needing more data due to driving fluctuations (heavier traffic today, warmer air temp tomorrow, etc), pump inconsistencies make HUGE errors at that scale.

I understand being eager to know what's working. In fact, I fill every 200 miles, even though I can get 400 miles per tank. I get stable results if I fill at 200 miles. That's enough to account for inconsistencies in my driving, the road, the traffic, the weather, and the pump. Also, I pump at the same pump every time.

This sig may return, some day.
theholycow is offline   Reply With Quote
Old 06-12-2008, 06:28 AM   #3
Site Team
Join Date: Dec 2006
Posts: 652
Country: United States
If you were parked uphill last time you filled, and downhill on this fillup, that can relocate fuel in the tank.

I like to run three full tankfuls and average all three tanks (a 3-tank running average) to see how my mileage is. (This is complicated for recording your mileage in a normal notebook, but simple to calculate with Excel etc.)

-Bob C.
Think you are saving gas? Prove it by starting a Gas Log, then conduct a proper experiment.
bobc455 is offline   Reply With Quote

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
Holy EOC! GeekGuyAndy Hypermiling 14 08-08-2007 05:49 AM
Greetings from Japan. GasSavers_Diemaster General Discussion (Off-Topic) 8 07-13-2006 06:56 PM
Just ordered some VX rims...... GasSavers_Jack General Fuel Topics 20 06-10-2006 06:17 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 11:37 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.