You CAN do this at home and you don't need Slick 50 or any other snake oil. Notice that they never run these display engines at anything above idle. An engine in good condition can survive on the thin film between bearing surface and crankpin, as long it's properly cooled and not under a load.
The carny pitchman may not want you to know about this web site but check out:
www.ftc.gov/opa/1997/9707/slick.htm Then decide for yourself.
