What does 15W40 mean? / 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. These have good flow properties at cold and warm temperatures. This means that the important lubrication points in the engine are optimally supplied at cold and heat. 15W refers to the flowability at cold temperatures (W=winter). It is still pumpable down to li25 °C, i.e. liquid enough to disperse in the engine. The number 40 describes the flowability of the engine oil at an operating temperature of 100 °C. The kinematic viscosity of a 15W40 oil at 100 °C is in the range of 12.5 16.2 mm²/s. ADDINOL Diesel Longlife MD 1548 is a Heavy Duty Engine Oil (HDEO) with an outstanding SHPD level in SAE class 15W li40. The optimal combination of proven base oils and innovative additives solves the complex, high lubrication requirements for trucks, heavy commercial vehicles in construction, agriculture and forestry as well as buses and other special cases in Europe and America in an excellent way. APPLICATION AREAS Perfect combination for Heavy Duty Engine Oil (HDEO) market segment. Particularly suitable for trucks, heavy commercial vehicles in construction, agriculture and forestry as well as buses. Excellent for use with RME (biodiesel). Shortening the oil change intervals! Please note the new regulations of the vehicle manufacturers! CHARACTERISTICS Practice oriented rheology Low emission, extremely high soot control High level of performance and long life character Excellent thermal and oxidative stability Fulfillment of the valid Euro III emission requirement BENEFITS FOR THE USER Long engine life Very clean engines in all operating conditions Very long oil change intervals Prevention of paint formation, deposits and oil thickening li> long oil service life Reduction of the lubricant lirelated exhaust gases, low oil consumption