Gas pump accuracy?
in [Toyota]
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From: Jeff on 22 Jun 2007 17:49 EdV wrote: > If you want to do all the fuss then you can buy a 10 gallon fuel > container. At the gas pump fill it up to 10 gallons and check if it > match the proper level. After that you pour the gas to your tank. The states do that already to make sure that the pumps are accurate and consumers not ripped off. The states are supposed to use values that aren't even, say 3.56 gal, to keep the vendors honest. I know it is hard to believe, but there are some vendors who will try to rip people off. Jeff
From: larry moe 'n curly on 22 Jun 2007 17:49 EdV wrote: > If you want to do all the fuss then you can buy a 10 gallon fuel > container. At the gas pump fill it up to 10 gallons and check if it > match the proper level. After that you pour the gas to your tank. But then you have to check the fuel level in the 10g container because the Prius holds only about 8.5G.
From: Jeff on 22 Jun 2007 17:54 larry moe 'n curly wrote: > > EdV wrote: >> If you want to do all the fuss then you can buy a 10 gallon fuel >> container. At the gas pump fill it up to 10 gallons and check if it >> match the proper level. After that you pour the gas to your tank. > > But then you have to check the fuel level in the 10g container because > the Prius holds only about 8.5G. Not to mention, that most gas cans are 5 gallons. However, considering that the Prius tanks are 8.5 gallons, I think I see a solution. Jeff
From: GO Mavs on 22 Jun 2007 18:42 but gas mileage can change depending on how and where you drive your car... for example if one trip across town reuquires more uphill driving, it isnt going to give you the same read out... i am sure you knew that but i am just saying... "Chuck Olson" <chuckolson01(a)REMOVETHIScomcast.net> wrote in message news:8eWdnQysP_e1ZebbnZ2dnUVZ_qOpnZ2d(a)comcast.com... >I write down what my Prius says my average MPG was when I fill up. Then I > calculate from the miles and gallons pumped what my average MPG was and > write that down. They rarely agree, and almost always the pump says my MPG > was less than my Prius said. But once in a while, the pump MPG is higher > than the Prius MPG, and when I go back to that pump, it always shows > higher > MPG. This lasts until the pump checker comes around and fixes it. Then off > I > go on a new search for a high MPG pump. The latest pump gave me 54 MPG > when > the Prius said 50.6. > > Maybe you just have to go to the pump that's in the sun rather than one > that's nice and shady, or the pump that is off to the side compared to the > natural flow of traffic through the pump aisles. But you can find that > golden pump - - you just have to believe in the MPG reading your car > calculates, and use that as the standard of comparison. > >
From: GO Mavs on 22 Jun 2007 18:43
i usually top off.. add another dollar of gas to the car after the automatic click.. "Jeff" <kidsdoc2000(a)hotmail.com> wrote in message news:RQVei.59$111.58(a)trnddc05... > mack wrote: >> "Chuck Olson" <chuckolson01(a)REMOVETHIScomcast.net> wrote in message >> news:8eWdnQysP_e1ZebbnZ2dnUVZ_qOpnZ2d(a)comcast.com... >>> I write down what my Prius says my average MPG was when I fill up. Then >>> I >>> calculate from the miles and gallons pumped what my average MPG was and >>> write that down. They rarely agree, and almost always the pump says my >>> MPG >>> was less than my Prius said. But once in a while, the pump MPG is higher >>> than the Prius MPG, and when I go back to that pump, it always shows >>> higher >>> MPG. This lasts until the pump checker comes around and fixes it. Then >>> off I >>> go on a new search for a high MPG pump. The latest pump gave me 54 MPG >>> when >>> the Prius said 50.6. >>> >>> Maybe you just have to go to the pump that's in the sun rather than one >>> that's nice and shady, or the pump that is off to the side compared to >>> the >>> natural flow of traffic through the pump aisles. But you can find that >>> golden pump - - you just have to believe in the MPG reading your car >>> calculates, and use that as the standard of comparison. >> >> If you're looking for the "golden" pump, you probably won't find it in >> the sun. The sun's heat makes gasoline volume expand, so you actually >> get a little less than you would pay for if you bought your gasoline >> during the hours of darkness, when it's usually cooler. It's not a big >> thing, but it could make a small difference in your calculated mileage >> figures. > > It's the temperature of the gas when it goes through the mechanism that > measure the volume, not the nozzle. Gasoline when it comes out of the > ground is a more or less temp because the ground is a much more constant > temp than the air. So changing the time of day that you get gas doesn't > matter. The only thing you don't want to do is get the gas right after the > tanks are filled, so that the dirt in the tank is not stirred up. > > The angle at which your car sits, the speed of fuel going into the tank, > when the the nozzle kicks off and how the tank it topped off are going to > make more of a difference about how much gas gets into your car's tank at > a particular fill-up. Over the long haul, though, it will even out. > > The other thing I do know is that it is possible to adjust the volume of > fuel going into the tank according to the temperature at the volume > measuring device in the pump. Except in Alaska and Canada and other > Northern parts of North America, it is rarely done on continent. In fact, > in some states OPW, which is a company that makes the device won't even > sell it. I guess the oil companies don't want people to get that finally > 1% of gas that they pay for. > > Jeff |