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Odometer Accuracy for tracking mileage
I just filled up last night and I have kept written records of miles and fuel used since I got the car. I have a ScanGuage II and it showed a 854 mile tank. The VW odometer showed only 836 miles since the last fill-up. I calibrated the SGII to the highway mile markers to get an accurate mph reading. Most VW owners report the speedometer is about 3 mph higher than actual speed. I have since gotten a GPS and just wondered what would be MOST accurate: odometer, SGII or GPS? I could leave the GPS in the car and only reset the trip feature at fill-up to get miles per tank. Would this give me more accuracy than either of the other two?
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60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun 
https://ecomodder.com/forum/showthre...tml#post621801
Quote:
Originally Posted by freebeard
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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