I remember when I was buying my new Exmark Turf Tracer HP a few weeks ago that my dealer said I should add a few drops of the engine oil to the outer air filter for the 15HP Kawi engine. Any of you guys do the same thing with your Exmark mowers? I thought that was strange so I looked in the owner's manual and there was no metion of it so I didn't add it. I've since changed the oil and the outer air filter once each. I blow out the air filter with the blower often and it seems to be running fine. I put all the gear in a covered trailer. Well yesterday afternoon I could detect a faint smell of something burning so I got concerned. I didn't see anything that could catch fire near anything hot. Perhaps it was just fumes from when I ran the mower in their. Anyone else experience this? Pollen has been messing with my sinuses. Thanks.