Bob Provencher wrote:
"Steve" wrote in message
t...


As far as 2 stroke engines having valves... well they must. Isn't it the
valves that let in the fuel/air mixture and let the exhaust back out?


Yeah I've heard that one as well. They do have valves, they're just not the
same kind you have in a 4 stroke. They have reed valves which are one way
valves that open on the upstroke as pressure inside the cylinder is reduced.



the clasic (old) 2 stroke design did not have valves.
the new ones though do have valves to get improved performance
at the fuel burning process.
i do not thinnk that a two stroke engine will have any problem to
operate with any oil type as long as it has the right density
so that it will provide the correct lubricant effect.
after the lubrication of the oil the oil is burned with the rest of the
fuel.
i believe that even filtered waste oil from kitchens could be suitable
(as a lubricant) for two stroke engines.
some years i saw an article about a guy who used fried potatoes oil for
his petrol car as fuel (not even as lubricant) with excellent results.
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Nick Apostolakis
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Web Site: http://agriroot.aua.gr/~nickapos
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