What are the reasons for the decrease in power after the first maintenance of the Envision?
2 Answers
After the first maintenance of the Envision, the decrease in power may be due to the wrong viscosity of the selected engine oil or overfilling of the engine oil. Engine oil is known as the blood of the engine, as it plays roles in lubrication, cleaning, sealing, heat dissipation, buffering, and rust prevention within the engine. When adding engine oil, it is essential to ensure that the oil level is between the min and max marks on the dipstick. The Envision is equipped with Buick's eConnect 2.0 connectivity technology, supporting features such as SuperID personal accounts, remote upgrades, WeChat music and location sharing, cloud-based intelligent voice interaction, and fleet functions, providing consumers with a rich array of cloud applications.
As a car owner who frequently deals with repairs, I feel that the Envision's power drops after the first maintenance, and there are quite a few reasons for this. First is the engine oil issue—if the technician uses oil with too high viscosity during maintenance, the increased internal friction in the engine will naturally affect acceleration; too low viscosity is also problematic, as insufficient lubrication can cause component overload. Second, the ECU system resets after maintenance and relearns driving habits, but this process may temporarily reduce power, which typically recovers after driving a few hundred kilometers. Third, fuel system cleaning residue can clog the injectors, slightly lowering combustion efficiency. Fourth, an incorrectly installed or clogged air filter directly reduces air intake, affecting horsepower. Fifth, human errors like overfilling or underfilling oil can lead to abnormal oil pressure. I recommend first checking the oil dipstick to measure the oil level—if it exceeds the upper limit, drain some. If that doesn’t help, connect a diagnostic tool to read fault codes and check for sensor misreporting. Choosing the correct oil type during regular changes is crucial—don’t skimp by using non-genuine products.
