I have always taken very good care of my 48" eXmark variable speed belt drive. I got a little too proud of it's power the other day and put a hurtin on it. I mowed a lot with 3 ft tall grass ( no exageration ) and the machine bogged a lot but did a great job as always. Well, I gave it the usuall once over last night and notices that I burned up all the gear oil in tranny, all the oil in the crank case, and more grease than normal. All this after only an hour of mowing. Everything seem to be OK but I could use a little advise. 1. Should I freak out? What should I look for or listen for as far as potential problems that may arise when I begin using it again. 2. The specs say to use SAE 30 oil in this Kaw 14 but this stuff seems awfully thin. Will using SAE 40 be a stupid thing to do or might it keep the engine running cooler? Thanks in advance for the help. I enjoy lurking thru this forum and absorbing from you guys.