Mezue ahịrịokwu na-esonụ: N'oge Lotus na Clark jiri ụgbọala atọ na injin dị iche iche. Lotus 43 rụrụ nke ọma na mmeghe South African Grand Prix, yabụ Clark jiri Lotus 33 ochie na Monaco Grand Prix na-esote, na-ala ezumike nká na nkwụsịtụ nkwụsị. Lotus malitere mkpakọrịta ya na Ford-Cosworth. Ụgbọala mbụ ha, bụ Lotus 49 nke nwere injin F1 nke kachasị nwee ihe ịga nke ọma n'akụkọ ihe mere eme, Ford-Cosworth DFV, meriri n'ọsọ mbụ ya na
Dutch Grand Prix, nke Clark na-akwọ. O jiri ya merie ọzọ na British, United States na Mexico Grand Prix; na, na Jenụwarị 1968, na South African Grand Prix.