Chrysler's fin-tailed line of autos last week took top honors in all four price classes of the 1957 Mobilgas Economy Run, making the company^ first in the competition's history to sweep the field.
At the end of the four-day, 1,568-mile course from Los Angeles to Sun Valley the trophy-for the best gas mileage among 23 competing cars went to Chrysler's Imperial Crown, which averaged 64.5153 ton-miles per gallon, computed by multiplying the car's weight by mileage, dividing by gas consumed. Driver of the winning car:
Mel Alsbury Jr., 27, of Hollywood, who piloted a Chrysler Imperial Southampton to victory last year.
Alsbury...