What are the reasons for increased fuel consumption after an engine overhaul?
1 Answers
After an engine overhaul, the increased fuel consumption is due to the new parts being more precisely machined and tighter, which increases the engine's workload, leading to higher fuel consumption. This is a normal situation. Reasons for increased fuel consumption after an engine overhaul: The viscosity of the engine oil used increases, and higher viscosity oil is generally better. The primary function of engine oil is lubrication, and higher viscosity indicates better quality. However, if the oil viscosity is too high, the engine will encounter greater resistance during high-load operation, consuming more power and, consequently, significantly increasing fuel consumption compared to before. Precautions after an engine overhaul: Avoid high engine speeds; it's best not to exceed 3,000 RPM. After a cold start, it's advisable to warm up the engine for a while before driving, typically about 5 minutes, until the water temperature begins to change. Adhere to the vehicle's specified load capacity, preferably not exceeding 70% of the maximum load. Avoid sudden acceleration and hard braking whenever possible. Hard braking can cause significant impact damage to the new engine, especially during sudden acceleration, which can severely affect the break-in of new engine components and directly impact the fit between parts. Anticipate sudden situations while driving, maintain a steady speed, and drive smoothly. Keep the speed between 50-80 km/h, but avoid prolonged low-speed driving. Pay attention to gear changes and avoid driving in a single gear for extended periods.
