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On 4 Mar 2005 at 12:27, Petri O. Calderon Larjanko wrote: > Can I ask. How accurate can one get with this. Whenever I add petrol > (gasoline) I never fill up, always just add 20 litres or so. When I > write down the odometer reading I take note of the level of the petrol > gauge, but it would be really hard to really pinpoint the exact > location of the petrol gauge needle since there are only 4 marks and > two of those are full and empty. How do folks do it in the list? I fill up each time. I don't know how else you could do it, other than keep a running record so that you could add up all the gas and all the miles for a rather long time period. Then you'd have only the error of one fillup to deal with. Why not fill up the tank each time? In the long run it's no different. I have a little notebook in the glove box of each car and every tankful gets recorded with date odo reading and gals. There are spaces where I can come back later and enter miles (the difference between the last 2 odo readings and divide by the gals. This way I can look back and see how things have varied over the years and seasons. The best part is that when something goes wrong, I can see it in a sudden change in the mileage trend. With some effort, I think I could dig up the notebooks from every car I ever had, starting with my '62 Beetle. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~