Quote:
Originally Posted by low c1500
Summer gas helps alot over winter blends, and so does the warmer temperatures, warmer air is thinner, and that means less wind resistance.
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Stick to just the summer blend gas making the positive difference in fuel economy. Density altitude ("warmer air is thinner") is true but is a non factor with regard to economy.
As for the Ficht, I'll beleive it when there is factual, non-biased info.