Gas pump accuracy?
in [Toyota]
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From: sharx35 on 22 Jun 2007 19:21 "GO Mavs" <GoMavs(a)MavvZ.com> wrote in message news:ogYei.1227$yN.942(a)trnddc07... >i usually top off.. add another dollar of gas to the car after the >automatic click.. That's what caused Engine Check light to come on in my 99 Camry--trying to get every last drop in caused P type error codes to activate the Engine Check Light. Once I stopped putting fuel in after the automatic gas pump cut off, I stopped getting those bogus engine check lights. > > > "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 > >
From: sharx35 on 22 Jun 2007 19:25 "Elmo P. Shagnasty" <elmop(a)nastydesigns.com> wrote in message news:elmop-06F243.16214222062007(a)nntp1.usenetserver.com... > In article <8eWdnQysP_e1ZebbnZ2dnUVZ_qOpnZ2d(a)comcast.com>, > "Chuck Olson" <chuckolson01(a)REMOVETHIScomcast.net> wrote: > >> 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. > > You cannot use the Prius gas tank capacity from fillup to fillup as any > indicator of how much fuel you actually used. > > This is a fact. It's because of the bladder inside the tank, primarily. > It stretches or not to differing degrees, depending on a whole host of > factors. The result is a bladder that takes more or less fuel each > time, and virtually never the same amount--even filling from the same > pump. > Bladder? what the Hell is the point of a bladder inside a car gas tank? Sounds like some bogus environmental feature mandated by the Communist Republics of California or Massatwoshits.
From: sharx35 on 22 Jun 2007 19:27 " dbu,." <nsp(a)einp.com> wrote in message news:nsp-08DBDB.17394622062007(a)comcast.dca.giganews.com... > In article <ptXei.131$111.123(a)trnddc05>, Jeff <kidsdoc2000(a)hotmail.com> > 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. >> >> 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 > > Hopefully some day they will re-institute fuel rationing. Then you will > have no argument. You will be happy to have received your 2 allocated > gallons of fuel. You will not question it, because there will be 20 > people behind you waiting and it will be back to the end of the line > for you after you get finished complaining. I'd have no problem with fuel rationing: it is NOT necessary to make multiple trips to the supermarket: one a week is ample. Good planning would save millions of gallons/litres a day. > > -- > > > > carpetbagger: a person perceived as an unscrupulous opportunist > > "I'm not going to have some reporters pawing through our papers. > We are the President." Hillary Clinton
From: GO Mavs on 22 Jun 2007 20:22 good to know.. guess i wont be topping off anymore... "Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message news:98ebf$467c5217$44a4a10d$12508(a)msgid.meganewsservers.com... > > "GO Mavs" <GoMavs(a)MavvZ.com> wrote in message > news:ogYei.1227$yN.942(a)trnddc07... >>i usually top off.. add another dollar of gas to the car after the >>automatic click.. > > That is a bad habit to get in to. Besides the risk of spills, there is a > chance, albeit small, that you can contaminate the charcoal canister from > constant overfilling. When the pump clicks off, I just round up to the > nearest nickel or dime. > -- > > Ray O > (correct punctuation to reply) >
From: Wickeddoll� on 22 Jun 2007 20:27
"GO Mavs" ... > good to know.. guess i wont be topping off anymore... > > > "Ray O" ... >> >> "GO Mavs" ... >>>i usually top off.. add another dollar of gas to the car after the >>>automatic click.. >> >> That is a bad habit to get in to. Besides the risk of spills, there is >> a chance, albeit small, that you can contaminate the charcoal canister >> from constant overfilling. When the pump clicks off, I just round up to >> the nearest nickel or dime. >> -- >> >> Ray O I never topped off, anyway. Seemed kind of obsessive-compulsive to me. Natalie |