leaking oil and oil in the air filter but no watter in oil

would that also make oil come out of the engine at th top i thought that it might a head gasket i also lose power when i go up hill

ok so what would be the best and safest way to unclog the crankcase i have over 220,000 miles on it i will check the plugs, catalytic converts, mass air sensor and change the pcv valve any orhet suggestions would be greatly appreciated i dont know much about cars im a chef.

Buy a CRC Mass Air Flow Sensor cleaner, most parts store sells it and clean the sensor also. Some shops offer engine flush with a machine, during the service there is a special additive goes through the oil passages and remove sludge and carbon deposit. Zee