According to "The Flintstones" (ABC, 1960-66) theme, how did the Flintstone family car run?

The Flintstone family car ran through the courtesy of Fred’s two feet in “The Flintstones”.

What kind of a car was the title character in "My Mother the Car" (NBC, 1965-66)? The title character in the TV series "My Mother the…
Who were the parents of the family on the TV series "An American Family" (PBS, 1973)? William (Bill) Loud and Pat Loud were the parents of…
Who composed the eminently hummable theme for TV's "Batman" (ABC, 1966-68)? Neal Hefti composed the eminently hummable theme for TV's "Batman"…
Who played the Partridges in TV's "The Partridge Family" (ABC, 1970-1974)? Shirley Jones (Shirley); David Cassidy (Keith); Susan Dey (Laurie); Danny…
Whose hand played Thing on the TV series "The Addams Family" (ABC, 1964-66)? Ted Cassidy's hand played Thing on the TV series "The…
Who provided the voice of Jane Jetson in the original run of "The Jetsons" (ABC, 1962-63)? Penny Singleton did the voice of Jane Jetson in the…

According to “The Flintstones” (ABC, 1960-66) theme, how did the Flintstone family car run?