devilfish79, thanks for the thoughts on the synthetic oil. My mechanic, who is gold star rated, told me how Yamaha representatives had explained to them the enhanced lubricating qualities of synthetic since the molecules are all the same size creating more even lubirication. Another friend of mine, who rides and is a physicist, explained to me how the synthetic oil molecules will not shear like standard oil. I don't claim to understand all the technical details from both individuals, but I certainly realize that their advice, if followed, should translate into prolonged engine life. My only concern was when another friend, who has been riding for 30 years, said that it used to be better to wait several thousand miles to let the engine totally break in with standard oil before switching. He uses a semi-synthetic blend. But, even he acknowledged that advanced technology in engine design may no longer necessitate waiting that long to go synthetic. There are undoubtedly numerous opinions on both sides of this issue. I am just curious to see what others think or what their experiences have been with standard vs synthetic oil in regards to when to switch.