Technically it's a Buick Eight. I called it an 88 because in the photo the license plate said 1948 on it. I should probably change the title so it's not so confusing, huh? The Olds had an 88 model. It's probably because it had a V8 engine.
I asked because neither of the two reasons that came to mind made any sense; it's obviously not a 1988 Buick, and the 88 was an Oldsmobile, not a Buick (I'm not sure why Oldsmobile had a 88 and a 98).