down shifting wastes gas
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Originally Posted by Mr. Eryozgatliyan,Jan 6 2011, 09:13 AM
Hey OP, who died and made you tip god of the world? 
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From: Tulsa, OK
Originally Posted by magician,Jan 6 2011, 12:27 PM
It also uses some gas after you've stopped pressing the accelerator; it would be accurate to say that it uses no more gas than idling for the same period of time. (I suppose that it's possible that the computer will recognize that the engine doesn't need to burn fuel to maintain speed - I don't know everything about computerized throttle control - but it seems reasonable that at least a little fuel will reach the cylinders even under engine braking.)
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From: Yorba Linda, CA
[QUOTE=wickerbill,Jan 6 2011, 12:35 PM]Modern fuel-injected cars have throttle position sensors that can determine when the throttle isn't open and they cut off all fuel if the engine is above idle speed.
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Originally Posted by Penforhire,Jan 6 2011, 01:34 PM
Also, brakes are cheaper than what you wear in your driveline by constantly engine braking. Most brakes are made for easy maintenance. Driveline parts, rings, valves, and such? Not so much.
Clutch? Nope
Diff? Doubt it
Engine itself? No way
Anything else