midget series - displacement rule in AAA (later USAC) sprint cars - displacement rule for the Indianapolis 500 under AAA rules - for Indianapolis (during the 1930s fuel consumption rules) - displacement rule for Indianapolis under USAC rules - displacement rule for turbocharged engines at Indianapolis (to 1968) - displacement rule for turbocharged engines at Indianapolis (1969 and later) World Championship Indianapolis 500 summary From 1950 to 1960, the Indianapolis 500 was a round of the World Drivers' Championship. See Indianapolis Motor Speedway race results for a more complete list. In the 11 World Championship years, the Meyer-Drake Offenhauser engine partnered for at least one race with the following 35 constructors: Adams Bromme Christensen Deidt Del Roy Dunn Eagle Elder Epperly Ewing Hall Kurtis Kraft Kuzma Langley Lesovsky Marchese Maserati McLaren Meskowski Moore Nichels Olson Pankratz Pawl Phillips Rae Schroeder Sherman Snowberger Stevens Sutton Trevis Turner Watson Wetteroth Complete Formula One World Championship results (excluding the 1950-1960 Indianapolis 500) (key) References Formula One engine manufacturers Indianapolis 500 Engine manufacturers of the United States