Dear friend, just translated the Japanese... it is written that fill 31 pressure in both front and back tyres...
0w20 is only present in KIXX, which is a korean oil, u can use it if u find the original one... nearest to it are Zic 0w30 and Zic 5w20, both are good... I am using Liqui Moly its changing interval is longer, means 8-10 k KM, but fueal average is almost same... Zic should be changed around 7-8 K Km...