Friday - 65-70 degrees out. Toro 52" WB w/ velke. 200-ish lbs Operator. Ran it for about an hour and half straight. Got a call and he said it was broke. Went to see it for myself. The oil was thinned so much it dripped off the dipstick like water. Very warm. Its still clean from being stored all winter. New filters etc.. 15 Kohler. Its got 105+/- hours on it. Any ideas?