Hey Scotty, my 93 Celicas head gasket has been sweating oil for almost six months, mechanic says I…

Hey Scotty, my 93 Celicas head gasket has been sweating oil for almost six months, mechanic says I can drive like that since it is not overheating or mixing oil/coolant. At first when I saw it sweating it was about an inch from the head, now it’s all the way to the sump, no drips on the floor. What should I do? Fix the gasket now or wait any longer? Here in Serbia parts can get expensive but labor is pretty cheap, combined much cheaper than new engine/car.
My oil change interval is 6k mi using “hydrocracked” group III Mobil Super 5w30 API SM oil. Is that ok? I drive 80% highway miles rarely above 70 mph mostly 55mph

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