A car of this brand.
"He took his Oldsmobile to the mechanic for a routine oil change."
An American car brand belonging to GM.
"The Oldsmobile was an American car brand that belonged to General Motors before it ceased production in 2004."
The name combines "Olds," from founder Ransom E. Olds's surname, with "mobile" to describe his automobiles first sold as Olds cars in 1897. Over time, the public blended these two words into a single term that the company eventually adopted officially.