Buy engine oil meeting theIveco 18-1811 CLASSE S2 Engine Oil Specification, for delivery to your home, workplace or mechanic. Need to service your Iveco van? Find all the Iveco 18-1811 CLASSE S2 specification oils you need right here. Ensuring that your Iveco has the correct oil is critical to its health and its internal delicate components. Having the right oil not only ensures correct lubrication but also provides cooling and cleaning, so always check your handbook.