If they need oil, why? These units are sealed. Are the gaskets bad. Are the shafts worn. If so, a company called APPLE Does a professional rebuilding should they need it. Also look in Hemmings for this service.
I started a thread in the HIPO section on hearing a comparasion. Its called "lever shock vs modern tube". Please guy's review the topic and post your comments. I need your imput. Thx.
Dave