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03-21-2010, 07:59 PM | #19 | |
Drives: 2008 Yaris Sedan Join Date: Feb 2010
Location: Oklahoma City, OK
Posts: 323
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Quote:
Gasoline weighs about 6.5lbs/gal. So 1.1 gallons weighs about 7lbs. Or about 0.25% of the weight of the car (with me and my suitcase in it). Of course, the *average* added weight over the course of the tank is half that, or about 0.125% of the weight of the car. And on the Interstate, wind resistance dominates. The difference made by the extra weight works out to about 0.02 mpg. However, despite the humorous flights of fancy in the public service announcement, there are enough rational reasons not to top off that I've switch to filling at the pump's slowest setting and then pumping as much as I can by pulling the trigger *ever so slightly*, just once to make sure that the automatic mechanism got it right the first time. It doesn't work out to more than 0.1 gallons more. And the method seems to give me a consistent adjustment factor on the scangauge. -Steve |
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04-26-2010, 12:54 PM | #20 |
"LibertyRides!"
Drives: 2010 Yaris 3Dr LB | 2020 Stang Join Date: Mar 2010
Location: State College, PA, USA
Posts: 576
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I fill up at the slowest pump speed. Once the pump clicks and shuts off, I wait about 10-20 seconds and fill around .100 of a gallon more.
By filling up at the slowest speed reduces the gasoline vapors, therefore not wasting the gas that has evaporated. This is less volume in a fill-up... saves a tiny bit!
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~ Mark ~ 2010 Yaris 3-Dr Liftback, 5-Speed Manual, P185/60R 15, Bayou Blue Pearl I Love my YARIS - (Click below to see Gaslog): Most miles Tank: 538 tank/10.148 gal = 53.015 MPG / Most MPG: 54.95 MPG (ethanol) 425 tank/7.73 gal "The evils of government are directly proportional to the tolerance of the people." -- Frank Kent |
04-26-2010, 06:22 PM | #21 |
Drives: 2010 Yaris "5-door" Join Date: Mar 2009
Location: Upper Waiakea Forest Reserve
Posts: 170
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I've always done one shot past the first shut-off just to make sure it wasn't cutting off prematurely - occasionally pumps will shut off a bit prematurely. It's absolutely restrained compared to how my relatives pump gas. ;)
We don't have the vapor sucking pump nozzle in Hawai'i. Mmmmm...those lovely heady gas vapors. :D |
12-03-2011, 04:28 AM | #22 |
Drives: Blue 5 door hatchback Yaris Join Date: Apr 2011
Location: USA but it has green light?
Posts: 25
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How many times till that happens? Is that just a long term effect?
I've been topping off all the way to the top of the tube to make sure my mpg calculations were as accurate as possible. I haven't noticed any bad side effects. I just thought it wasn't a good idea because of the risks of spilling gas when it gets close to the top. I wont be doing that anymore. |
12-04-2011, 12:09 PM | #23 |
Drives: 2008 5 sp. LB Join Date: Oct 2010
Location: Idahoi
Posts: 268
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I just use the same pump at the same station every time (locally of course) and just quit when it clicks off. I'll even wait for that pump to be available, and I park the exact same way and spot, that should be consistant enough. I use the fast pump mode, I just like getting in and out of the station quickly, while other drivers are still pumping (and paying).!
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12-04-2011, 11:17 PM | #24 |
Drives: 07 Yaris sedan Join Date: Jun 2007
Location: Keremeos BC
Posts: 986
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Yeah, why is that so hard to understand? If it was a good idea to clog that cannister, they really wouldn't install it in the first place! It is a SYSTEM, dammit!
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12-06-2011, 01:03 PM | #25 |
Drives: 2007 Toyota Yaris Sedan Join Date: Aug 2011
Location: Chilliwack, BC Canada
Posts: 59
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If you are really interested in your mileage then join a site such as fuelly.com or spritmonitor.de (European site). These sites keep track of your MPG plus other expenses. I find after about 10 fillups that your MPG stays about the same.
Roy |
02-11-2012, 03:58 PM | #26 |
Drives: 2007 Yaris Join Date: Jan 2012
Location: Laval, Canada
Posts: 74
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topping off is very bad on the charcoal canister
i topped off my my 2005 echo a couple of times and i had to endure the check engine light 5 months p0446 i think i erased it regularly and finally after 5 months it didn't come back it' like some gas went somewhere where it wasn't supposed to and it took a while to evaporate |
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