So I've noticed that I've been losing oil over time and I'm not to sure on where to start looking. There is oil in the air filter and the PCV was changed out around 258,600KM I'm now at 275,000KM. I replace my oil every 10,000KM and run full synthetic. Does anybody have any ideas before I start ripping things apart and start replacing seals on the oil pan and what not? (Even though this should probably be done anyway) The only recent thing that happened was my A/C compressor kicked the bucket and the belt wouldn't stay on so I had to drive with no power steering,water pump or anything really all the way back home. Could this have ruined the head gaskets maybe?