As everyone else has said it's probably 5W30. I buy Mobil 1 when its on sale at crappy tire, got my last 5L jug for 25 bucks. You can also use 0W20. I say this because twice when I was at my dealer getting a freebe oil change and this is what they used. I did notice better gas mileage with it. For reference my micra is a 2015 S manual and the oil cap doesn't have it listed on it. I think there is a sticker under the hood though.

I also always use a filter and crush washer from the dealer.