Marvel oil is OK, but this stuff is better:

www.kanolabs.com

If you're anywhere near Nashville, go to Thompson Lane and buy a quart or a gallon of Kroil and soak the cylinders and valve guides with some of it. Two ounces or so in each cylinder will penetrate even solid-rusted rings and end up in the crankcase after soaking a few days. Remove the starter, put a pry bar on the flywheel teeth, and give it a good pull. The crankshaft should turn.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!