Hi Tbaleno:

___I don’t know what kind of temps you actually drive in but making an even lower 5 degree spread is almost useless for most. It is at best a guess as to the average temps. I use Weather.com to calculate the temps of my starting out point and destination each and every drive and keep a running total in my head. After the tank is done, I create a type of average that somewhat models the actuals but is by no means an actual number. A better way of explaining it is this, is the temperature at the time you leave in the morning within 5 degrees of the temperature you arrive home in the evening? I highly doubt it let alone the small variables in local trips to the mall/grocery store/movie house at varying times and temperatures of the day … I work a rotating days off - rotating shift and keeping track of that mess within 5 degrees would be best left for the mathematicians with a mileage weighted - real time - actual average …

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___Waynegerdes@earthlink.net