Class8

There were earlier automobile companies in the US, such as Duryea and Oldsmobile, of course gone now. Autocar was a very early automotive player and built the first motor truck commercially available for sale in 1899, then they focused on cars for a few years. Since all the earlier vehicle companies and brands went out of business that leaves Autocar as the oldest motor vehicle brand as well. https://en.wikipedia.org/wiki/Autocar_Company