I have a 2 month old Gravely compact pro 34 with (22 hours on it) a Kawasaki FX481V 15.5hp vtwin that burns oil on start up. Its not much just a puff of blue smoke right at the start. Other than that runs really well. Its in the shop right now, they did a leak down test and said the engine checked out good. The tech said burning oil on start up is normal, which i think its BS. A good friend of mine has a Big dog with the same motor and his doesn't burn any oil. Any advice?