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Old 11-15-2012, 07:44 AM   #238
stevehnm
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Quote:
Originally Posted by flyboy1100 View Post
http://www.carbibles.com/fuel_engine_bible_pg4.html

And this still applies. I know for a fact that I can speed up and slow down(60-25) as long as my speed doesn't exceed 60-65 I can get better mpg than at a constant speed of 75-80.

" How does a constant speed of 75-80mph result in better than epa ESTIMATES? Remember not guaranteed mpg at ANY speed. You realize parasite drag increases at an exponential rate, which means your heavier car with more power is going to burn even more gas as your speed increases. I am a pilot afterall, I have a pretty good understanding of physics. This concept is no different than in an airplane where I can use x power setting and go x speed, or y power and y speed (usually not much faster, 5%) but use 30-50% more fuel."
I agree with you and that has nothing to do with my point. I never said that, despite your repeated attempts to make a straw man out of my position. I said going a constant 60 mph will get you better mpg than constantly speeding up and slowing down but averaging 60.

Your link is false as well, because it says one can never get as good mpg as the EPA estimate. One can. It's just not worth it, unless one is happy to be making less than minimum wage while driving really slowly.

So answer the question.
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