Ignition vs. Roll start?

[fmicle]

Originally Posted by yarrr

That's because there's no blood/breath test for smugness.

I like the fact we're still ignoring the fact that turning your engine off in motion is illegal in most states.

Does that make a hybrid illegal?

[Canuck]

Originally Posted by fmicle

Does that make a hybrid illegal?

When tha gas engine goes off, full power is still applied by the electric. It's the shutting off of all power sources while in motion that is illegal.

[dingbat]

Interesting thread. Got me thinking about some things.

What does the extra wear an tear on the car translate to in barrels of crude? If the life of the starter, trany, etc. is shortened, how much energy does it take to manufacture, transport, and install those parts? Is it less than the amount saved by this practice and how much less?

If shutting the engine off when coasting does increase the risk of accident, what is the percentage of people doing this that will end up in an accident? Will the gas savings of all the other folks who don't end up in an accident off-set the equivalent cost in crude of the tow truck, police cruiser, medical emergency vehicle, being run to and from the scene for the one that does? The cost of replacement parts, installation of those parts etc......?

[yarrr]

Originally Posted by dingbat

Interesting thread. Got me thinking about some things.

What does the extra wear an tear on the car translate to in barrels of crude? If the life of the starter, trany, etc. is shortened, how much energy does it take to manufacture, transport, and install those parts? Is it less than the amount saved by this practice and how much less?

If shutting the engine off when coasting does increase the risk of accident, what is the percentage of people doing this that will end up in an accident? Will the gas savings of all the other folks who don't end up in an accident off-set the equivalent cost in crude of the tow truck, police cruiser, medical emergency vehicle, being run to and from the scene for the one that does? The cost of replacement parts, installation of those parts etc......?

Take out the ifs, and I agree 100%. Don't forget if you're turning your engine off, you're already at 40+ PSI in the tires - combined with no engine, I'm betting bailout&co hit 0 about 20-30 feet after a stock yaris. This is what is called "common sense" and if you use it, you realize just about every hypermiling "technique" has a chance of costing you your life at worst, and more money than you're saving on gas at best.

Originally Posted by Loren

I don't get extreme with it. I don't drive slower than the flow of traffic, and generally don't accelerate slower than they typical "slow poke", I don't run red lights, and... what was this thread about? Oh yeah... I don't shut off the ignition in my normal driving. To me, it's far more trouble than it's worth for daily driving.

This is safe sane hypermiling. Saving gas, no chance of killing people, nice stuff all around, no?

Much past that, its just a game and a gamble if you are going to save any money.