Bob Earley wrote:

Hello again, Paul

Do all rotary engines in aircraft application need oil added (by mix or injection) to help preserve the apex seals? First, I thought it was only turbo engines, but now it seems everyone is talking about it. I've never seen any mention about the cost of 2-cycle oil when people are comparing (costs) of rotaries to conventional engines.

Bob

One once per gallon is not much. My 182 engine probably burns more oil than that.

Paul Lamar
 
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