r06 engine requires 0w20 or 5w30 oil. You can use 5w30 for better engine protection under load (like sustained high speed driving on motorway/ mountainous region driving). and this is not a self invented tip, its from suzuki JP service manual guide.
you have the choice to follow japanese manufacturer guidelines or the dumb local suzuki pakistan who have no idea about the internals of the car they are "assembling"
