Re: [Chrysler300] Gas Math

["Michael Reed" <mrreed@xxxxxxxxx>]

I think many of you are barking up the wrong tree with the math calculations -- from here anyway.

The speedometer on my "F" reads low... quite low. At 55 mph indicated it is actually traveling at 67 mph -- a 22% error. But... the odometer is right on! No perceptible error. A 10-mile trip down the expressway using mile markers at the beginning and end displayed 10.0  on the odometer. The GPS also recorded 10.0  miles. 

Speedometer and odometer error can be related, but isn't necessarily related. Whether there is a corresponding error depends on the cause of the error.

The odometer reading might be correct as displayed, Larry -- and maybe it isn't. The speedometer and the odometer could both be incorrect, but with the odometer having a different rate-of-error (percent) than the speedometer. 

Mike Reed in Lake Odessa, Michigan


  ----- Original Message ----- 
  From: JettLarry@xxxxxxx 
  To: chrysler300@xxxxxxxxxxxxxxx 
  Sent: Monday, January 26, 2009 7:48 PM
  Subject: [Chrysler300] Gas Math


  Back from trip to Temecula to hob nob with fellow 300'rs. Trying to get a 
  handle on the MPG. In 772 miles I used 62.6 gallons of hi-test. Easy enough 
  here. Divide 772 by 63 showing 12.25 mpg gross. BUT, speedo is widely 
  optimistic. The GPS says when the odo shows 83, actual road velocity is 70. This 
  appears to be 18 percent high. Do I multiply the 12.25 by 118 which gives 
  14.45? Or perhaps reduce the 772 miles which would also be 118 % high to the 
  actual road miles driven? Maybe that is the same but cocktail hour is 
  drawing near and don't want to damage the few brain cells left, that is Jack 
  Daniel's job. Help. I was always asleep during math.....only woke up for lunch 
  and auto shop. LJ
  **************Know Your Numbers: Get tips and tools to help you improve your 
  credit score. 
  (http://www.walletpop.com/credit/credit-reports?ncid=emlcntuswall00000002)

  [Non-text portions of this message have been removed]



   

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