Automobiles.. Inventions Denverite Harvey E. Seeley, Jr. designs device to increase gas mileage and cut down harmful exhaust. Post i1 17, 1968 p.41 Bill Forington modifies Toyota engine to improve milage 86% RMN F 24, 1974 p.8 Bill Forington modifies carburetor on his Toyota Celica, increasing mileage to 53.6 m.p.g.- Post Mr 3, 1974 p.23 Bill Forington's adapted car does not get 53 miles per gallon. RMN Mr 14, 1974 p.,5 Post Mr 14, 1973 p.3