I've never encountered anyone who understands cars who actually uses one. There are plenty of superstitious behaviors, and paying good money for unrealistic devices is certainly on of them. If such a device actually worked, Detroit and other vehicle manufactures would likely include it in their engines. Remember that all manufacturers are required to meet some rather difficult fuel consumption standards.
Yes, especially if it is a strong tornado.
A tornado that does not touch the ground is a funnel cloud.
a tornado chaser is someone who researches tornadoes and follows track to take pictures of the tornado. I wouldn't recommend you being a tornado chaser, because it can result in bad harm, and it may be fatal :/ but.. anyone can be a tornado chaser.. if they dare. All they need is a camera and they can start working. But it depends really. Do you want to be one? You can study about weather and work your way up.
Yes, a tornado is not considered a tornado unless it reaches the ground.
It doesn't really. A tornado in a bottle provides amusement, but little else.
yes but they are really rare
not really. It depends more on the specific conditions of the storm that produced the tornado.
Fast air. Really, really fast air.
there really online like wikipedia.com
No one really know pressure can vary for the type or category of a tornado.
The "fire tornado" forms from the fire; it doesn't really matter how the fire starts. Also, a "fire tornado" is more properly called a fire whirl as it technically isn't a tornado.
No. A tornado watch only means a large area has conditions favorable for tornadoes and is telling you to be on the lookout. You chances of getting hit by a tornado are still quite low.