For 1983 the Penske team acquired the Pennzoil sponsorship with its yellow paint scheme. Teammate Al Unser took that year's title. The team switched to the March chassis for the 1984 Indianapolis 500 after the Penske chassis proved unsuccessful in the first two races of the year. Mears scored his second Indy win that May but suffered severe leg injuries later in the year in a crash at Sanair Super Speedway. The March chassis, like most contemporary open-wheel racing cars, sat the driver far forward in the nose, with little protection for the legs and feet.