Effect of Engine Oil on Fuel Consumption and Durability of Heavy-Duty Vehicle

摘要

Based on the analysis of the test results, the following conclusions can be drawn: Compared with the reference oil CI-4 15 W-40 diesel engine oil, the candidate oil 5 W-30 diesel engine oil (using Lubrizol fuel economy formulation) had the certain fuel efficiency benefits. The result of chassis dynamometer test showed a clear differentiation between the averages of fuel consumption in L/100 km with a total of 3.8% less fuel consumed on the candidate oil compared to the reference oil. Using the drive cycle of EMS vehicle in Beijing, the proving ground test showed that the candidate oil showed a decrease of 1.5-2.5% BSFC compared to the reference oil. During the field test, the low-viscosity candidate oil provided good lubricant protection. The oil monitoring result showed that the oil properties were normal. The inspect result of the disassembled engine was acceptable. Due to the long-running mileage of the vehicle before the test and the changing of oil, it was difficult to determine the real reason for engine wear. More research work and tests need to be carried out.