If you take it to the dealer, follow the recomendaitons in the manual, but you will find that you can do ost of the service yourself for a lot less$. If you change your own oil,the new 4100s have a smaller crankcase and filter, they DO NOT take the full 2.8 qts the manual states. It will take about 2.3 or so, stop at 2 qyts and fill the rest a little at a time, checking the dipstick.