
The Boyue's engine is produced by Auto and utilizes Volvo's technology, making it a domestically manufactured engine. The engine model for the Boyue is JLE-4G18TDC, a 1.8T version with a maximum power of 135kw/5500rpm and a maximum torque of 285Nm/1500-4000rpm. The 2.0L version has a maximum power of 104kw/6000rpm and a maximum torque of 178Nm/4000-4500rpm. Here are some daily maintenance tips for the Boyue's engine: 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 filter. The quality of any lubricating oil will degrade over time. After a certain mileage, its performance deteriorates, leading to various engine issues. To prevent 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 accumulate in the filter. If the filter becomes clogged and oil cannot pass through, it may rupture the filter or open the safety valve, allowing dirty oil to bypass and return to the lubrication system, accelerating engine wear and increasing internal contamination. 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. These mix with metal particles from component wear to form sludge. Small amounts remain suspended in the oil, while larger amounts precipitate, 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 not only ensures the engine operates properly but also extends the overall lifespan of the radiator and engine.

I've been driving the Boyue for two years. This car is equipped with Geely's self-developed 1.8TD turbocharged engine, paired with a 7-speed dual-clutch transmission, which makes driving quite exciting. For daily city commuting, the fuel consumption is around 9L/100km, and it can drop to 7L/100km on the highway. What I like most about this engine is its strong low-end torque; the turbo kicks in at just 1500 rpm, making it very responsive at traffic lights. Last time, I drove fully loaded with five people up a mountain road, and the power didn't let me down at all. By the way, the 2023 Boyue COOL has added a new 1.5T four-cylinder engine with 184 horsepower, which is more fuel-efficient. I heard it can run on 92-octane gasoline, significantly reducing costs.

When repairing a Boyue, I disassembled its engine. The 1.8T direct injection technology is quite interesting. The cylinder head integrates the exhaust manifold, allowing for very quick warm-up during cold starts, saving a lot of time for heating in winter. The turbocharger uses a small-inertia turbo, making turbo lag almost imperceptible. However, it's important to regularly replace the timing belt, as the manufacturer recommends changing it every 60,000 kilometers. After all, the belt is located at the rear of the engine, and oil leaks can easily damage it. Last time, an owner delayed replacement until 80,000 kilometers, resulting in the belt breaking on the road and costing nearly ten thousand yuan for major repairs.

I've been paying attention to the Boyue engine for a long time, and the second-generation 1.8T has been significantly optimized compared to the first generation. It uses a silent chain instead of belt drive, and the valve cover has been replaced with aluminum alloy, basically solving the oil leakage issue of the older models. The mid-range acceleration is particularly stable, with a strong push-back feeling from 60km/h to 120km/h when stepping on the accelerator. However, the engine noise is slightly louder during rapid acceleration, so it's recommended to do full-car sound insulation. The new BHE15-EFZ 1.5T engine now has a thermal efficiency of 39%, saving 1.5 liters of fuel per 100 kilometers compared to the old 1.8T.

During the test drive of the Boyue, I specifically studied the engine parameters. The old 2.0L naturally aspirated engine with 141 horsepower was indeed sluggish. The current main 1.8T engine delivers 184 horsepower and 300 N·m of torque, and its off-road capability is quite good when paired with the BorgWarner four-wheel drive system. One practical detail is that the engine ECU learns driving habits, making gear shifts noticeably smoother after three months of use. However, friends in Northeast China should note that this engine has a conservative cold protection setting – at -25°C, it won't accelerate without warming up, so remote start is necessary in winter. The new hybrid version uses the Leishen 1.5T hybrid-specific engine with a thermal efficiency of 43%, making it extremely fuel-efficient.

Disassembled the Boyue's engine and found significant improvements in casting technology. The cylinder block utilizes HDEV technology, with cooling fins denser than those in joint-venture vehicles. The dual-ventilation design of the crankcase effectively reduces carbon buildup; after 100,000 km, the piston tops only had a thin layer of black soot. Special attention must be paid to the engine oil—the manufacturer requires C2-grade 0W-20 low-ash oil, as using the wrong oil can easily clog the GPF. The most surprising aspect is the balance shaft design; the three-cylinder's rhythm feels steadier than some four-cylinder engines, with almost no noticeable vibration at idle even with the AC on. Now, the Thor hybrid system uses a dedicated 1.5T engine with a world-leading 44% thermal efficiency, truly catching up with top-tier technologies.


