This is specifications from zic official website that X7 recommended for demands of SG.
I asked them already that why on website they don't put in both Gasoline and diesel category, the ZIC representative told that as x7000 r meant for heavy duty diesel engines so they have anti foaming agents which r hard on old rubber parts usually damages engine seals, distributor seals and s spark plug packings specially in Suzuki pathetic quality so they have specialised category X7....
Pak Suzuki also recommends ideally SG grade for Cultus so me ne is Mey hee aafiat samjhi hamesha k better hay manufacturers recommendation plus oil vendor suggestions hee follow karte raho.. Opar se Pak Suzuki oil is also cheaper.
Personally I have tried different brands of oils in cultus in last 19 years but mujhe sab se ziada cleaner engine result dia Shell 10w40 ney