The 1975 Los Angeles Times 500 was a NASCAR Winston Cup Series race that took place on November 23, 1975, at Ontario Motor Speedway in Ontario, California. This was the last race where the car's model year was part of the race info. From 1975 onwards, the passenger vehicles that people actually drove in real life started to deviate from the stock cars exhibited in NASCAR due to environmental regulations on the automobile industry. The gulf between NASCAR vehicles and regular passenger automobiles started to become even greater throughout the 1970s, 1980s, and 1990s. By the 21st century, regular passenger vehicles had nothing to do with the NASCAR vehicles except for the manufacturer name and the model of the vehicle.