I just purchased a Cheetah 61in with a Kawasaki . I do have one question about the oil but I mainly want to tell why I went with a Cheetah . I have been using a toro zmaster . I had it narrowed down to three mowers Toro,Exmark.Scag . Toro / Exmark the same besides the deck . I futher more narrowed it down to toro / Scag . I ruled Exmark out due to the spindles being cast aluiminun with non greasable bearings. I was looking at both mowers side by side and man scag builds a tough looking mower . I was sold on scag's spindles and the replaceable deck wheel brackets and replaceable front end ( if it ever see's any damage ) . I was concerned about the room because I'm 6'2 but after letting the seat back and raising the handles it fit just fine . I don't have much seat time yet to give it a full review but so far I love this mower ! Now about the oil in the kawai . I always used straight sae30 in the old toro . Do you guys switch out to 10w30 or keep it straight sae30 ? If you switch then why ?