Regular Versus Premium Gasoline  Regular Gasoline Has As Much
Merit As Premium Gasoline  "Put a tiger in your tank," says a
classic advertising tagline. In today's motoring world, what
kind of fuel grade will have the power to place a beast in your
gas tank?  The answer, according to experts who study fuel
efficiency in detail, is both regular and premium gasoline. And
it would be a waste of money to favor premium over regular,
especially in these times when gasoline prices are high,
according to the experts.  Virtually nothing is gained by
filling up with a premium or more expensive grade of fuel than
the vehicle manufacturer has recommended, the experts say. And
many of the same experts explain that drivers may not lose much
performance from their cars by using a lower grade of fuel than
recommended by the car manufacturer.  There is little difference
in energy content of regular versus premium gasoline. They both
contain about 111,400 British Thermal Units of energy per
gallon.  The price difference, howev