I just purchased a new V Star 950. Haven't rode it much but a few miles to my storage. I need to know if using Mobil 1 synthetic oil would be recommended after the break-in period. A salesman at the dealer told to me to stay away from any synthetic oil and just stick with YamaLube. I used synthetic in the C50 that I traded with great results. Does he know what he's talking about? He didn't/couldn't give me any specific reasons as to why he advised against it. Thanks.