
dfmb20aqa engine is a 2.0L displacement Atkinson cycle engine developed by Dongfeng Liuzhou Automobile Co., Ltd., and it is a domestically produced engine. The dfmb20aqa engine has a maximum horsepower of 133 HP, a maximum power of 98 KW, a maximum power speed of 6000 rpm, and a peak torque of 200 N.m. For the dfmb20aqa engine model, the following maintenance methods can be used in daily life: Use lubricating oil of appropriate quality grade. For gasoline engines, SD--SF grade gasoline engine oil should be selected based on the additional devices of the intake and exhaust systems and usage conditions; for diesel engines, CB--CD grade diesel engine oil should be selected according to the mechanical load, with the selection standard not lower than the requirements specified by the manufacturer. Regularly change the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, the performance deteriorates, which can cause various problems for the engine. To avoid failures, the oil should be changed regularly according to usage conditions, and the oil level should be kept moderate. When the oil passes through the fine holes of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is blocked and the oil cannot pass through the filter element, the filter element may burst or the safety valve may open, allowing the oil to pass through the bypass valve and bring dirt back to the lubrication parts, accelerating engine wear and increasing internal pollution. Regularly clean the crankcase. During engine operation, high-pressure unburned gas, acid, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and the cylinder wall, mixing with metal powder generated by part wear to form sludge. When the amount is small, it suspends in the oil; when the amount is large, it precipitates from the oil, blocking the filter and oil holes, making engine lubrication difficult and causing wear. Regularly use radiator cleaner to clean the radiator. Removing rust and scale not only ensures the normal operation of the engine but also extends the overall lifespan of the radiator and the engine.

I'm an owner of a Dongfeng vehicle, and the DFMB20AQA is Dongfeng's self-developed 2.0L engine. My Dongfeng AX7 is equipped with this engine. It delivers ample power, with city driving fuel consumption around 8 liters per 100km, and it's particularly fuel-efficient on highway cruises. This engine utilizes DVVT technology, making throttle response very smooth. Maintenance is also hassle-free—typically using 5W-30 oil, with an oil and filter change costing just over 300 yuan. Some fellow owners have driven up to 150,000 kilometers without major repairs, making it a pretty durable engine among domestic options.

I've seen several vehicles equipped with the DFMB20AQA engine at the repair shop, all of which were Dongfeng Passenger Vehicle models. The model naming has its specifics: DFM stands for Dongfeng Motor, B is the code for gasoline engines, 20 indicates a 2.0-liter displacement, and AQA denotes the specific iteration version. This engine was jointly developed with PSA and features an aluminum alloy block paired with direct fuel injection technology. Pay special attention to the timing chain, which needs inspection at 100,000 kilometers. One AX7 owner delayed replacement until 150,000 kilometers, resulting in valve damage and a repair cost exceeding 8,000 yuan.

The DFMB series is Dongfeng Passenger Vehicle's proprietary engine brand. The DFMB20AQA model is used in SUVs such as the Fengxing T5 and Fengguang ix7. It delivers a maximum power of 150 horsepower and 180 Nm of torque, paired with a Honeywell turbocharger. One notable detail is that its oil-gas separator is designed inside the valve cover, which tends to develop oil seepage around 50,000 kilometers—make sure to have the mechanic check this area during maintenance. The spark plugs are recommended to be replaced every 40,000 kilometers, with the factory-installed iridium spark plug set costing just over 200 yuan.


