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"Most drivers tend to shift too early and waste fuel."<br> <br> Not Correct.<br> <br> It is impossible to "shift too early" unless you "lug" the engine. That would be too early. For some reason there is almost no data on the subject. I have been searching for years and only found some data tonight.<br> <br> http://www.jari.jp/pdf/rt2005/09Fu_eng.pdf<br> <br> In general, the most efficient speed to drive is the lowest speed you can drive in the highest gear.
By Al
