Best tank ever?

Discussion in 'Gen 2 Prius Fuel Economy' started by hdrygas, Apr 6, 2005.

  1. hdrygas

    hdrygas New Member

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    I may have had my best tank ever, 57.348 (calculated) This is the story. We had a warm snap 2 weeks or so ago. Temps into the 60's even. At the end of that the weather turned and it got cold and was raining so I filled up a different pump that I usually do. I also filled the tank early at 416 tank mi because I was going on a trip the next day and wanted to buy gas locally at a known lower price. I had 53.1 mpg on the computer and had been driving a new rout too and from work that had the mpg climbing during the second half of the tank. It was in the high 30's when I filled blowing and raining sideways. The pump was one of those hard ones and I had to baby every gallon in and I put just over 7 gallons in and that was it. I did not spill but I could not get more in. I would have expected about 8 gallons. So I get the "best tank" and I figured I short filled the tank and the next one would be low but it was not. Despite bad cold weather I got 53.057 mpg, and the gage was normal no early dropping from "full" as I expected. That fill was usual at my regular pump that plays nice with my car. The second fill was also short miles 348 on the tank because I was going on a longish trip and did not want to hunt for a station in Seattle where I do not know the area and prices. So is this my new best or not.
     
  2. hdrygas

    hdrygas New Member

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    Here is a follow up my last tank that I drove to the last bar was a 8.955 gal fill with a calculated mpg of 45.226 mpg my second worse tank. The computer said 51.3 which seems more intuitive as there was a longish drive on the freeway and I have been driving very carefully. Am I having seeing difficulty with the bladder that is throwing off the calculated mpg from the pump. At least one of these I thought was a short fill because I was having terrible problems with the pump shut off. I will never use that pump again. Any ideas? This is not making a lot of sense to me. Maybe the only number I can trust is the lifetime average?
     
  3. TonyPSchaefer

    TonyPSchaefer Your Friendly Moderator
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    My best tank on record is 50.5MPG.

    for now...

    The tank I'm currently working on is hovering around 53.0MPG and I'm doing all I can to make sure it finishes above 53. That will be my best tank to date.
     
  4. paprius4030

    paprius4030 My first Prius

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    Just got it last week. Local driving around at Jekyll Island, Ga. 54 mpg!!!!
     
  5. Isabelle

    Isabelle New Member

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    I actually haven't kept track historically (wish I had), but I think the current tank may be the best. In the first "real" spring week late March and early April, we came in at 49.99. The current tank, reflecting a week of some gorgeous weather in the 60s (but still 39-40 in the morning), we are currently running at 54.0 after 400 miles. I think when the morning temperature breaks consistently above 40, something around or above 55 is certainly doable, even here in New England.
     
  6. priusham

    priusham New Member

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    Right now baby! Temps are up, odometer miles up, and mileage UP! Showing 51.8 @ 400 miles on current tank.

    http://www.w8kc.com/priusmileage.htm

    You guys that wished you tracked your mileage from the start may as well start now!
     
  7. DaveinOlyWA

    DaveinOlyWA 3rd Time was Solariffic!!

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    i have tracked every drop of gas ive used and ive come to the conclusion that the MFD numbers are about as accurate as you can get.
     
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