Bevore I swapped the 216 for a 261 in the 41 I reved the sh...t out of the old splash oiler on our german Autobahn for several years to keep up with the traffic (remember we have no speed limit over here and 65 mph is the slowest yo can go without being an mobile road block).
This was an original - never rebuilt - high milage engine. I´m glad to say that when we took the head off for a new gasket we found the valves and seats in perfect shape.
So even with unleaded gas and steady Germany Autobahn rpms over 4000(!) it seems not to hurt too much.
Frank
