Honda GVC160 engine, change it once a year with WM straight 30 non-detergent oil like the manual says. No wasting money using 0w-40 GC or RL in a mower.....
Pete591 said:I changed Amsoil SM HP 10w-30 out of my 9 HP snowblower and 4 HP Honda edger. Oil looked pathetic. Valves sounded bad...even thought I was going to throw a rod in the new Honda 9HP.
Now...5w-30 Royal Purple SL grade in both engine. Run great and quiet.
Never an SM oil again!
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Sounds somewhat like me. When I ran out of my old stock of M1 5W30 I was using in my mowers and other OPE, I went to the M1 10W30 High Mileage oil, which is still SL.