Hi People I have a couple questions, so I had a 20 yo Honda HRR mower with the gcv160 engine, never burned any oil between changes never got a puff of smoke on startup unless I turned it upside down for some reason, deck was shot so I bought a new Honda HRN216 from HD with the GCV 170 engine this year. It has a punch mark and a green dot on the data plate so I assume that means it has the Cam factory replaced? Anyway It has about 10 hours on it now I get a beautiful "Puff of Smoke" on start up any time it sits and oil the level is down 1/2 way on the stick after 5 hours? (I changed the oil twice (10w-30 conv.) during the 1st 5 hours) for break in, I mean, I know this is a lawn mower but Is this somewhat normal for the GCV170 engines with low hours these days?