My Ace Hardware snow blower (Yard Machines 21") has a horizontal shaft GC120 Chonda on it. It calls for synthetic 5w30 which I run (Travelers, Tractor Supply Co.) and on the first OCI there was enough gold flakes to open up a mining operation. The first OCI had maybe 3 hours on it? I can't remember. My Honda HRS216 push mower has a vertical shaft genuine GC160. The first time I changed the oil on it (way more hours than the snow blower) the oil did not have a visible flake in it. The first OCI had a solid 7 hours on it. I refilled with Mystik 10w30 syn blend HD oil bought cheap at the local farm store. I am interested to see what kind of longevity the Chonda produces. I have the utmost confidence in the GC120 clone but I find its massive shedding of gold flakes interesting. Maybe it was left over from production? I should note that the Chonda on my snow blower does not have an air filter which could contribute to increased wear but I highly doubt there is much if any particles to be sucked in during the winter. Time will tell.