OK, here is a clarification. A few suirts of oil, say up to 5 cc into a combustion chamber of 50 cc or more should not lock up hydraulically, although it could lead to some smoke when the engine eventually fires up. Those folks who recommended filling the entire cylinder with kerosene or some other light oil let it soak for a few days to just get the engine free before turning the engine with the plugs OUT to squish out most of the fluid before putting the plugs back. The point about carb dryout is a good one since gaskets can shrivel and dry out and leak gas initially posing a fire hazard. So far you have not said whether the engine turns freely and whether this is a hot rod with a V8 or the original engine.

Don Shillady
Retired Scientist/teen rodder