I read through the manual yesterday. Everything said 0w-20. Does it actually say 5w-20 somewhere and I missed it?!If its in the manual then use it (5w20 is also mention as a substitute at lease here in the US). Also yes it is. If you want to save a little bit on money checking the condition of the oil periodically between oil changes can give you a better idea on when its more realistic to change oil interval. I changed mines at 3k-ish only because its been 5 months since date of purchased and I personally follow the 4 months/5k change interval casually (Oil still looked new but I'm one of those mindful of oil contamination over time). So just make sure your oil is clean and you should be fine.