Saving the Day with Mercury Engine Oil
Motors cannot run without oil. Scratch that. Motors cannot run without oil for very long. They definitely cannot run without it for very long in a safe way, that will not break the engine. This is why it is so problematic when an engine has an oil leak. For most boat motors it is a good idea to change the oil at the beginning of every boating season.
My father always drained the oil out of his boat each winter. He would let the boat sit empty during the winter and then replace the oil in the spring when he was ready to use the boat again. This worked perfectly, until he forgot to fill it. He got the boat to the launch before he realized it was empty. He had to call me to bring him Mercury engine oil so that he could take the boat out safely.