[Turk]

Center Oiler, Top Oiler may have their advantages over Side Oilers. That is not the question. Poster wanted to know how to identify a Side Oiler from the rest.

Not likely that anyone selling a Side Oiler under the pretense it is a Top Oiler. One fetches more of a premium over the other. Want to guess which one?

There are blocks out there dressed to look like a Side Oiler. I have seen them. I have BOUGHT them.

Cross bolts not enough to identify a Side Oiler. Neither is the bulge.

TURK