The BMW 730 is equipped with a 2.0-liter turbocharged engine, model B48B20B. This engine delivers a maximum horsepower of 265 hp, a maximum power output of 195 kW, and a maximum torque of 400 Nm. The maximum power speed ranges from 5,000 to 6,500 rpm, while the maximum torque speed ranges from 1,550 to 4,500 rpm. The BMW 730's turbocharged engine is exclusively produced in Germany by BMW. For daily maintenance of the BMW 730's engine, the following methods can be applied: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions. For diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, with the selection standard not lower than the manufacturer's specified requirements. Regularly change the engine oil and oil filter. The quality of any grade of lubricating oil will deteriorate over time during use. After a certain mileage, its performance degrades, leading to various engine issues. To avoid malfunctions, change the oil regularly based on usage conditions and maintain an appropriate oil level. When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter becomes clogged and oil cannot pass through the filter element, it may rupture the filter element or open the safety valve, allowing oil to bypass through the bypass valve and carry contaminants back to the lubrication areas, accelerating engine wear and increasing internal pollution. Periodically clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. When the amount is small, it remains suspended in the oil; when large, it precipitates, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use a radiator cleaner to flush the radiator. Removing rust and scale deposits not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.
