I was driving a Thunderbird and I wondered why it had given Mr. White the blues. White wrote the song because he loved his Thunderbird. He sings about how he enjoys the car and the pride and status it gives him. Usually, men sing the blues about women and women about men, but blues can be about anything important to you. Cars have been important to many songwriters over the years, back to the very beginning of the auto industry.
Popular songs tend to reflect what is on the public's mind.
So songs for the early days of the automobile related to the novelty of cars, often tying the automobile to romance. Oldsmobile picked it up recently to use in its television commercials. There have been a long list of songs about motoring through the decades, most of which sank into well-deserved oblivion. During World War II, gasoline rationing was a popular subject for serious discussion and for comedians on the radio, making it a subject of popular songs as well. This reflected the hot-rod culture that was flourishing among young people almost unnoticed by the auto industry, and also how basic to courting customs the automobile had become.