While

8

At slow speeds it is more efficient to leave the windows open, but at highway speeds the additional drag caused by open windows costs you more gas mileage than you’re saving. So if you’re going faster than about 35mph, close the windows and turn on the A/C.

1

I have been using this light bulb for a while without any problem. All of a sudden the bulb made this hissing sound and lots of white smoke was released into the air. It had some chemical smell to it too. I unplugged the lamp and put it outside. I opened all the windows and had a fan pushing air out of the room.
How dangerous are these light bulbs if the mercury gas escapes from them? Is there enough gas in one light bulb to be dangerous? Should I worry about my other energy saving light bulbs? What makes the bulb break up like that? I had my toddler in my bed when this happened. Should I be worried about her breathing this stuff? We got out of the room within seconds, but we still breathed some of it.
Sorry for the multitude of questions: I’m worried.
Thanks to anyone who answers.
P.S. There was nothing other than the lamp shade around the bulb or on the lamp.

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2

To conserve gas, I have begun turning off the engine while I idle at stop lights (there are many more techniques I am utilizing, known collectively as “hypermiling”). For every minute that your car idles, how much gas is wasted?

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2

Reduce your speed. You use twice as much gas going 75 as you do going 55. Basically, if you’re exceeding the speed limit, bring it down a bit.
Llimit jackrabbit acceleration and sudden stops. The more steady your speed, the more efficient you’ll be.
Anticipate stops. Rather than going right from the accelerator to the brake, allow some coast time before coming to a smooth stop.
Learn the traffic lights on your commute and try to time yourself so you never have to stop at a light.
Combine trips, plan your route to minimize left turns at busy intersections.
Park at the back of the parking lot rather than wasting a lot of gas (and time) trying to find the closest possible parking space.
Walk or ride a bike whenever possible
If you own multiple vehicles, use the most efficient one whenever possible. If buying a vehicle, consider downsizing and consult http://www.fueleconomy.gov
Did I mention watching your speed?

4

You hear about what people call “hypermiling” to get better gas millage, and coasting is one of the things they recommend, but is it harmful to the engine to shift between drive and neutral while moving?

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1

drive slower. Anything above 45 mph the wind drag can be more important than the friction of the tirres on the road.
Turn off the AC. That can save up to 6 miles per gallon. (depending on the car and the speed you drive)
Keep the windows closed… opening the windows disrupts the aerodynamics of the car and increases drag (more important as speed increases)
minimize use of the accelerator and the brakes. A car is much more efficient if driven at constant speed.

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4

Does it make a difference for gas consumption if an automatic car is put into neutral while at a traffic light or coasting to a stop?

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4

This is an opinion poll.
What are your favourite driving techniques to decrease fuel consumption and increase your mileage?
Do you use different tires (summer instead of all-season), selecting Neutral often, trailing larger cars, turning off air-con, etc… Any ideas, suggestions, experiences welcomed.

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