[AT] Statistics In Tractor Manufacturing Was Bicycle Program

Jim Becker mr.jebecker at gmail.com
Wed Sep 18 05:56:45 PDT 2019


My car, a ‘12 Chevy Cruze, shows average mileage and speed on each trip meter.  (It also shows them in separate displays, but simply echoes what trip meter 1 says!?  I bet that is a program bug.)  Since I use and reset them, I don’t have averages of either number over the life of the car.  My wife had a ‘12 Equinox.  It had both those figures independent of the trip meters and she never reset either.  When we traded it in a year ago, it showed 105,987 miles, 27.8 mpg and 43.2 mph.  You can’t take it too easy and average 1,400 miles per month.  For at least the last couple years, she reported the mpg figure never changed.  The mph figure probably hadn’t much either.  Once you establish averages for 70 or 80 thousand miles, it would take some major changes in driving to change the averages.

By the way, the Equinox was still on the original set of tires.

Jim Becker 

From: Stephen Offiler 
Sent: Wednesday, September 18, 2019 6:33 AM
To: Antique Tractor Email Discussion Group 
Subject: Re: [AT] Statistics In Tractor Manufacturing Was Bicycle Program

Jim, I keep forgetting to check the hourmeter in my truck, but my car has a direct readout of average MPH.  I record it and reset with every tank of fuel along with MPG data.  The overall average of just under 3 years and just over 40K miles is 35.5 MPH.  Turns out I'm remarkably average.  I wear size Medium suits off the rack too. 

Steve O.

On Mon, Sep 16, 2019 at 10:52 PM Jim Becker <mr.jebecker at gmail.com> wrote:

  Several years ago, my brother and I were comparing odometer readings on our trucks.  My truck was older and had a lot more miles.  Then we checked hours.  His had a bunch more.  His truck use was probably pretty typical, including a fair amount of local driving.  As I recall, he averaged close to the expected 35.  I rarely use mine to just drive around on short errands.  Most of the mileage is on longer trips.  Earlier today, it turned over 100,000 miles and is just over 2,000 hours.  The average is 49 mph.  Since my highway speed is usually 70 or more, it seems it would be tough to get a long term average much higher.

  Back in the good old days, hour meters were typically grounded through an oil pressure switch.  If the engine wasn’t actually running and producing oil pressure, the hour meter wouldn’t clock time even with the switch on.

  Jim Becker

  From: Mike M 
  Sent: Monday, September 16, 2019 3:08 PM
  To: at at lists.antique-tractor.com 
  Subject: Re: [AT] Statistics In Tractor Manufacturing Was Bicycle Program

  I have a Scag zero turn that I bought new, I put about 350 hours on it over the course of several years.  When I parked it this last fall, I accidentally left the key on, so when I went to start it this Spring I had 3500 hours on it. Fortunately my daughter works at the dealer so I was able to buy a new one.  

  Mike M

  From: Stephen Offiler 
  Sent: Monday, September 16, 2019 7:32 AM
  To: Antique Tractor Email Discussion Group 
  Subject: Re: [AT] Statistics In Tractor Manufacturing

  For the record, in automotive engineering, the conversion between engine hours and road miles is usually taken to be 35, not 60.  I've also seen 33 used.  It's a broad approximation of course  Vehicles used extensively on the highway will be somewhat higher, and vehicles used extensively in heavy traffic/city conditions will be somewhat lower.  It would be exceptionally rare to find any roadgoing vehicle averaging 60mph. 

  SO

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