Don,t use any 15w40 or 20w50 oil for your ride at this time you can use any of these oils after 10K
because these are thicker oil & suzuki bikes does not like thicker oil
I have used this shell AX5 15w40 in my GS once bike engine was become heating so was shifted again to zic
Bro use zic M7 10w40 sythetic oil for your new ride synthetic oils are far far better from any mineral oil synthetic oils film are very strong & does not break easily & zic oils have A ability in them they always clean carbon inside from engine & does not deposit carbon inside the engine
You can start using this oil before your first 5K after this you can not
My elder brother is using zic M7 in his Suzuki GD110HU from start he is very very much satisfied from this oil
When he was shifted from SGO to Zic his bike pick up was become to double
Zic M7 is the best for your ride this is a open heart suggestion