Well, cost is always a concern. Seriously though, has anyone ever used this seafoam engine oil/fuel additive in their tractor/mower? I have used it before in my work truck and in the Cub and the Gravelys, but I poured it in through the carb intake and at a rate so as to not starve/cut out the engine. Smokes like a son of a gun for a few minutes and then back to normal. I never added it to the fuel before though - wondering if the ratio he used was too much? Wonder what adding too much to the fuel would do - permanent damage? I guess it raises the octane like that of what a jet fuel would be? Even before he added the seafoam I had always thought that the cub's engine seemed to be running hotter than what I was used too or would consider normal. Heat shieldis in place and not altered. The plugs are the correct type/model and are gapped. Do the Kohler Command series engines run hot? Always had Gravely walk behinds prior to this ride-on so dont have a lot of experience with cub cadets or the Command series of Kohler engines. I definitely dont like the single adjustment on the carb, very difficult to set a steady low idle without some kind of surging or changes in idle - never what I would consider smooth-surging is an issue to some extent. And yes, this is after following the manufacturers recommended carb adjustment/idling proceedures. I bought this used from a certified dealer with only 152 hours on it, so who knows what the previous guy did with it. Thanks for any help and information.