PJ, I was reading through my owners manual and it said to use 20W50 for the hydro's. Went to the product lit and it said 10W40. Stopped by the dealer to grab the filter for the 50 hr service and he made a call to be sure. There is a Service Bulletin out there saying Jan 09 build and newer (with a s/n to start) they made the change to 20W50 for the hydro's. Thought that you might want it posted out there so the guys buying them this year know what to use. Also can the guys with 08 and later models switch to the 20W50 or not? Might want to post the Service Bulletin.