Want to pose several questions, prompt discussion and not necessarily get involved in an argument on the pro's or con's of Ethanol or anger any farmers. 
Should we be using Ethanol in our 30's,  40's, 50's etc. Oliver Tractors when they were designed to be run on leaded fuel or should we stick with unleaded only?
Will they run too "dry" since lead in gasoline was intended/used as a lubricant not just to crust and cake up on the valves?
Would it make a difference if we are just cruising or if we are actually working/pulling our engines in the field?
What is everyone's thoughts on lead substitute?  It is available as an additive to mix with 20 gallons of gasoline.  Yes-No ?