FUEL-EFFICIENT ENGINE OIL FOR MOTORBIKES.
The designation 10W40 stands for the SAE class according to which the engine oil was classified. The SAE class describes the viscosity of an oil, i.e. its flow properties as a function of the operating temperature. Engine oil with class 10W40 is a multigrade oil with good flow properties at cold and warm temperatures. This is necessary in order to lubricate the engine optimally at all necessary points throughout the year. “10W” stands for flowability at cold temperatures (W=winter). It is still pumpable down to -30 °C, i.e. liquid enough to spread in the engine. The second part, “40”, describes the flowability of the engine oil at an operating temperature of 100 °C. The viscosity of a 10W40 oil at 100 °C is in the range of 12.5 -16.2 mm²/s.