vitesse
Member
This was posted by mistake, will not do it again.
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There will be all kinds of unaccounted variation is what some of us are saying. Besides the small fuel burn you would have to ride the same route, same speed, same temperature,same shift points, same humidity, same wind, same traffic, same pump, same gasoline sample, filled to exactly the same point. That's why there are standardized methods like the WMTC or EPA test cycle to remove as much variation as possible.Filling up with 74 miles on the tank is way, way too small of a sample, and subject to the variation in how full is full. Run at least 1000 miles on the pure gas before even thinking about drawing any conclusions. The 3% variation is going to be hard to pick out amongs the other variables such as temperature and riding style.
But if a portion of fuel used is replace by the same and the miles recorded are divided by that portion then that is the mpg for that portion of fuel. No more no less not at indication of anything other than the numbers. I do not expect that will be a consistent return, high 80s is great. I was simply stating that the only variation in my normal running was the non-eth.
Sorry I started this, just an observation and sharing that, not stating this as a norm or constant, if anything I filled the tank over what was originally used. Next time I'll just keep it to myself.