I have a 2003 yzf600r with a slip on and jet kit. I wondering what kind of oil i should be using. My goal is a oil chnage once a year. Bought the bike with 7k on it. 2nd owner. First owner did 1k dealer oil then 6k on castrol half synthic in a black bottle 10w40. I did the oil at 8k with amsoil metric 10w40. Currently have 12k miles on it and stored it. But once i take the bike out im changing the oil. I used a bosch 3323 with amsoil. I was thinking about trying the mobil 1 110 oil filter next oci but i have no idea on what oil i want to run. I dont do wheelis. City riding. Like to go through the gears most of the way. I want a oil that protects and can do atleast a 5-6k oci with a shared sump. Prefer price to be 50 bucks or less for 4 qts. Bike hold 3.2 but i use 3.5 with a car filter on. Bike used a little less than half a qt of amsoil oil before i parked it. Thats how much it took to top it off in the sight glass before i parked it.