What are the reasons for Audi's excessive oil consumption?
1 Answers
Specific reasons are as follows: 1. German cars have a different cylinder processing technology compared to other brands: their engine cylinder walls appear as a honeycomb structure under a microscope, with each tiny pore containing a small amount of oil. This design provides better lubrication for the piston's up-and-down movement within the cylinder compared to flat cylinder walls, minimizing wear between the piston rings and cylinder walls. The honeycomb structure retains more oil than flat cylinder walls, leading to higher oil consumption. 2. German cars have piston rings with excellent toughness but slightly lower tension compared to Japanese cars: this configuration naturally reduces wear on the cylinder walls caused by the piston rings' movement. As a result, German cars show significantly less cylinder wall wear even after hundreds of thousands of kilometers compared to Japanese and Korean cars, maintaining good engine condition. To ensure minimal wear, the gap between the piston and cylinder is slightly larger than in other brands. 3. German cars have higher engine compression ratios: as German cars pursue high power output, their compression ratios are higher than those of Japanese and Korean cars. Higher compression ratios inevitably result in higher temperatures inside the engine cylinders, which causes engine oil to be consumed more quickly. This phenomenon is particularly prominent in turbocharged engines.
