Lots of post on this recently but still confused. How do you know if your motor has been changed from X100 setting to X50 sitting. I have an 2006 225HO that had the update a couple months ago, but the computer still had use X100, according to the dealer. Would the oil setting been changed with an update in June 07. Can anyone tell with the model/serial numbers or do I have to take it back to the dealer to know for sure. Have always used X100 oil. Model # E225DHLSD Ser # 05136486