MOLTEN ROCK, or magma, and gasses spew from the mouth of a volcano in the Hawaiian islands. As rock inside the earth melts, its mass remains the same while its volume increases--producing a melt that is less dense than the surrounding rock. This lighter magma then rises toward the surface by virtue of its buoyancy.
Although each automobile dealer has the option to release new models at a time it chooses, most companies release new models between September and December every year. In addition, some brands are showcased earlier in summer car shows.
When to buy a used car. Seasonal trends in sales of new cars have a knock-on effect on the cost of used cars. March and September are the peak months for sales of new cars, often through part-exchange deals. So dealers will have lots of used cars to sell, which puts you in a strong position when negotiating.