4th season of AAA National Motor Car Championship, started 4th May and ended at 5th November 1912
Beginners of the season: George Joerimann , KC Krause , Ed Rasher , Scott Miller , Hal Shain , Earl Devore , Joe Horan , George Ainslee , Bill Rader , Billy Leisaw , WH Farr , Neil Whalen , Len Ormsby , Eddie Pullen , Frank Blizzard , James Rossi , William Chandler , Frank Verbeck , Ben Lawwell , Charles Elliott , Marion Trexler , Homer Trussell , Harry Hastings , William Hobbs , Otto Henning , WG Wordingham , George Hill , Harry Nelson , George Mason , Ray Snyder , Tom Rooney , John Menker , Jack le Cain , Armour Ferguson , PG Thebaud
Fiat
Mercer
Mercedes
Wisconsin
Mason
National
Benz
Knox
Falcar
Cino
Case
Maxwell
Flanders
Fiat
Hartford
Wisconsin
White
Detroit
Lozier
Westcott
Regal
Simplex
unknown
Schacht
Reo
Buick
Ford
Columbus
Dayton
Herreshoff
McFarlan
Ohio
Midland
Cole
Rayfield
Buick
Opel
Cutting
Lexington