@nightshade i have 2014 model swift and 2014 model cultus, but brother, there is no such sticker of shell oil.
Fully Synthetic 5W30 SF or 5w40 SF and budget oil is KIXX.{Kixx is Engine Oil Brand of GS Caltex which wasfounded in 1967 as a 50/50 joint venture between Chevron and LG Group of South Korea}.
I am using Zic X7 and it is perfectly alright .
Few days back purchased swift 2015....i put in shell 5w30...is it suitable for swift 21k driven car or not...the mechanic said that it is suitable ...
recommended oil for suzuki swift it should be 10w40.
5w is acceptable but upper limit which is 30 according to your selection is not good.
better to go for 5w40