For MITSUBISHI COLT/LAN-CER engines, universal (all season) oils. All-season oils have the advantage of being adapted to different temperature conditions (summer Winter). They are made on the basis of liquid one-season oil (e.g. 15W). Thanks to the so-called thickener, the oil is stabilized when hot, so that its lubricating properties are maintained under all operating conditions. Letter "W" in the SAE designation means the suitability of the oil for operation in winter conditions.