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better mpg top half of tank

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Old Aug 4, 2009 | 11:09 AM
  #16  
bigdog87's Avatar
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From: Destin, Florida
Originally Posted by Bluejay
You are not crazy and you are correct. I posted this a long time ago and got laughed at. I have kept a spreadsheet on mileage since my truck was new, 4 years. Everytime I take a trip, I will go top the tank off before I head out. If I put in less than half a tank, I get much better mileage. Over 1/2 mpg better. I dont have any explanation other than evaporation, but I know it is real and a fact. It happens every time.

Don't worry, I read an article that said to get gas before you go under 1/2 tank because everything under that like you said is affected by evaporation, and I also read to fill up early in the morning or at night, because during the heat of the day the gas heats up and expands and you actually get more vapor than actual gas, and to fill it up on the really slow one because the faster it flows the more evaporation it creates and the less actual gas you get, I'm really going to start cutting my cost and doing all of that!!
 
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Old Aug 4, 2009 | 12:17 PM
  #17  
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My gauge does that to me as well, itll read up to 260 miles on half a tank-then drops like a rock the last half.
 
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Old Aug 4, 2009 | 12:58 PM
  #18  
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From: the moral high ground
Originally Posted by Bluejay
You are not crazy and you are correct. I posted this a long time ago and got laughed at...
Wait! Does that mean Bluejay can take his straightjacket off?

Oh man, I have scoffed at all his posts for the last three years after his manical "...I have spreadsheet data!, blah,blah,blah...".

Who knew...
 
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Old Aug 4, 2009 | 01:01 PM
  #19  
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From: Burleson/Athens/Brownsboro, TX
Originally Posted by Raoul
Wait! Does that mean Bluejay can take his straightjacket off?

Oh man, I have scoffed at all his posts for the last three years after his manical "...I have spreadsheet data!, blah,blah,blah...".

Who knew...
You need to go back and read all my posts again, now that you know I know what I'm talking about.
 
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Old Aug 4, 2009 | 01:01 PM
  #20  
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From: NW Montana
Originally Posted by bigdog87
You drive a **** load!
Kilometers always seem like a ****load, but hey, my ***** is measured in inches and I don't do no stinkin' converting....

1 kilometer = 0.621371192 miles
 
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Old Aug 4, 2009 | 01:04 PM
  #21  
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From: Burleson/Athens/Brownsboro, TX
Originally Posted by deerhunter7979
Kilometers always seem like a ****load, but hey, my ***** is measured in inches and I don't do no stinkin' converting....

1 kilometer = 0.621371192 miles
You should, 3" would sound like a lot more in mm.
 
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Old Aug 4, 2009 | 01:11 PM
  #22  
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From: Destin, Florida
Originally Posted by Bluejay
You should, 3" would sound like a lot more in mm.

HAhahahahahha that's one of the best things I've ever read!
 
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Old Aug 4, 2009 | 01:12 PM
  #23  
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One thing you need to also consider is the total amount of fluids you are pumping at the gas station. If you will look, most likely you are not getting a full 1 gallon of liquids during your pump. And that adds up after 20+ gallons. Reason being is there is a set tolerance on the scales used to calibrate the amount being pumped. You have a high side and a low side on the tolerance. Do you honestly think that the gas stations are going to give you that high side? Slim chance !! So they constantly keep on the low side with their calibrations to ensure that you are not getting a full 1 gallon of gas when you fill up. There is little you can do about it other than complain to the City Auditor.
 
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Old Aug 4, 2009 | 01:13 PM
  #24  
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From: the moral high ground
Originally Posted by Bluejay
You need to go back and read all my posts again, now that you know I know what I'm talking about.

You should, 3" would sound like a lot more in mm.
Going to be a long day for me.
Gimme that straightjacket.
 
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Old Aug 4, 2009 | 01:53 PM
  #25  
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Originally Posted by Turd Furguson
One thing you need to also consider is the total amount of fluids you are pumping at the gas station. If you will look, most likely you are not getting a full 1 gallon of liquids during your pump. And that adds up after 20+ gallons. Reason being is there is a set tolerance on the scales used to calibrate the amount being pumped. You have a high side and a low side on the tolerance. Do you honestly think that the gas stations are going to give you that high side? Slim chance !! So they constantly keep on the low side with their calibrations to ensure that you are not getting a full 1 gallon of gas when you fill up. There is little you can do about it other than complain to the City Auditor.
Actually this is not something an individual station can even set, and the tolerences are so close (.5%) it would not make a noticeable difference in MPG anyway.

Pump accuracy is closely regulated. There is no conspiracy to rip you off, in fact they normally don't make more than a few cents per gallon to begin with, which is why you no longer see any stand-alone gas stations. They make their money with the c-store, car washes, etc. The gas is mostly there to get you in the door.

As an ex-station manager I get a bit touchy when people start in with this nonsense.
 
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Old Aug 4, 2009 | 02:09 PM
  #26  
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[
Originally Posted by Turd Furguson
Reason being is there is a set tolerance on the scales used to calibrate the amount being pumped. You have a high side and a low side on the tolerance. Do you honestly think that the gas stations are going to give you that high side? Slim chance !! So they constantly keep on the low side with their calibrations to ensure that you are not getting a full 1 gallon of gas when you fill up.
Originally Posted by plmn
Actually this is not something an individual station can even set, and the tolerences are so close (.5%) it would not make a noticeable difference in MPG anyway.

Pump accuracy is closely regulated. There is no conspiracy to rip you off, in fact they normally don't make more than a few cents per gallon to begin with, which is why you no longer see any stand-alone gas stations.
Plus not to mention if you went to the same station and same pump every time the variable wouldnt exist, and it would just be factored into your MPGs
 
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Old Aug 4, 2009 | 05:35 PM
  #27  
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I notice that when I fill up at less than 1/2 a tank it is becuase I dont feel like spending that much money and when the pump clicks I quit. When I fill up when I am near the E I know that I am going to spend $50 until the pump clicks and I dont mind putting another gallon or 2 in so I fill it up all the way.

For me my mileage can vary 1-2 mpg based on how much I want to spend.
If I fill it up all the way I can go 60 miles before it moves off the F
then I get cheap and fill up at half a tank and only go until it clicks. There is 1 to 2 gallons that I am not refilling all the way to the top where it was before, thus causing calculations to be off.
 
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Old Aug 4, 2009 | 05:52 PM
  #28  
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Originally Posted by Bluejay
You should, 3" would sound like a lot more in mm.
You didn't read the first half of my post....

Kilometers always SOUNDS like a ****load.

But it really isn't. So if you want to sound like a man, have at it. I will let the ladies *gasp* reaction speak for me.

Sorry, but you can't have it both ways.
 
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Old Aug 4, 2009 | 05:57 PM
  #29  
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From: Burleson/Athens/Brownsboro, TX
Originally Posted by jswd60
I notice that when I fill up at less than 1/2 a tank it is becuase I dont feel like spending that much money and when the pump clicks I quit. When I fill up when I am near the E I know that I am going to spend $50 until the pump clicks and I dont mind putting another gallon or 2 in so I fill it up all the way.

For me my mileage can vary 1-2 mpg based on how much I want to spend.
If I fill it up all the way I can go 60 miles before it moves off the F
then I get cheap and fill up at half a tank and only go until it clicks. There is 1 to 2 gallons that I am not refilling all the way to the top where it was before, thus causing calculations to be off.
Unless out of town, I but at one of two places and try to use the same pumps. I always fill up and fill to the top everytime.
 
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Old Aug 4, 2009 | 06:36 PM
  #30  
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Originally Posted by deerhunter7979
But it really isn't. So if you want to sound like a man, have at it. I will let the ladies *gasp* reaction speak for me.
You sure the gasp wasnt a gasp, followed by a chuckle?


Bluejay was just joking with you, take a chill pill
 
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