It's not up to NASCAR but rather the manufacturers decision.
Sometimes it is, some times it is not.
Highly unlikely
JR Motorsports currently uses the Chevrolet Impala in the Nascar Nationwide Series.
there are three 'Irish' Autobots. They are The Wrockers. Their names are, Roadbuster, Leadfoot, and Topspin. Roadbuster has a Scottish acent. He is a NASCAR Impala green and white. He is number 88. Leadfoot has a Cockney acent. He is also a NASCAR Impala, red and black. He is number 42. Topspin dose not talk in the movie. He is a NASCAR Impala, blue and white. He is number 48?
Carl Edwards currently drives a Ford Fusion for NASCAR. The Ford Fusion is a mid-sized car first produced in 2006, and the first to feature Ford's new three bar grille.
Depends per series. NASCAR Sprint Cup Series uses the COT (Car Of Tomorrow but now referred to Car Of Today). Dodge makes the Charger, Ford makes the Fusion, Toyota makes the Camry, and Chevy is using the Impala. NASCAR Nationwide Series uses older models of the NASCAR Sprint Cup. Chevy uses the Monte Carlo SS, Ford uses an older model of the Fusion,and the Mustang, Toyota with an older Camry, and Dodge with an older Charger. NASCAR Craftsmen Truck Series uses, well...trucks. We have the Chevy Silverado, Ford F-150, and Toyota Tundra.
Turner Motorsports is the Nascar Nationwide Series team that has Brandt as one of their sponsors. Justin Allgaier is the driver of the #31 Brandt Chevrolet Impala for Turner Motorsports.
Optimus Prime, Ironhide(GMC truck), Bumblebee(Camaro), Sideswipe(2013 corvette stingraye), Mirage/Dino(Red Ferrari), The Wreckers,(Tospin,blue nascar),(Leadfoot,red nascar),(Roadbuster,green nascar), Wheeljack,(blue Mercedes Benz.
Through race #20, Kevin Harvick's Chevrolet Impala and Kyle Busch's Toyota Camry are tied with three wins each in the Nascar Cup Series.
Dave Marcis has 33 starts. He last raced in the Daytona 500 in 2002.
Junior drives anything Chevy. He owns three Camaros which include a 2001 "Intimidator SS" Camaro, a Chevrolet Z71 pickup, a Corvette, two Suburbans, a 1964 Impala and a 1955 Bel Air. Among others.
2002: Pontiac Grand Prix2005: Chevrolet Monte Carlo2011: Chevrolet Impala