Guys, I purchased my brand Kymco Agility 125cc on December 11th, 2012 and I have gone through the first two service changes with it. The scooter shop uses nothing but AMS Synthetic oil to keep the bike running. They use 10w-40 to service the bike. AMS is good stuff. I like Mobil1 oil as well. As long as you take care of the bike it will take care of you.