Well if you’re not burning (smoking) any and your not leaking any (an impossibility with a 216 Stovebolt) then what speeds are you trying to drive it at? When you say highway speeds visions of keeping up with the toll way traffic comes to mind, 65-70 mph. If that’s the case then your probably winding the pi$$ out of the engine and loosing it out the draft tube.

I’ve not the luxury of having a spare original untouched draft tube to do an autopsy on but it wouldn’t surprise me if it had a wire mesh to help condense the oil mist and return it back to the crankcase. This is exactly what they used to keep the oil in on the later filler caps that were used with the solid covers. After 50+ years of service such as (burn outs) and rodding with coat hangers this has probably all been burned out or pulled out allowing the oil mist at higher engine rpm to blow out of the draft tube.
Denny Graham
Sandwich, IL

Last edited by Denny Graham; 01/18/2008 3:26 PM.

Denny G
Sandwich, IL