Should a 10-Year-Old Car Use 30 or 40 Oil?

[LaCooper]

10-year-old cars should use 40 oil. Here are the specific reasons: 1. Severe engine wear in older cars: For older cars, components such as the valve train and connecting rod mechanisms have already experienced significant wear. Therefore, it is advisable to choose a higher viscosity 40 oil. 2. Higher viscosity of 40 oil: 40 oil has a higher viscosity compared to 30 oil, allowing it to form a thicker oil film on engine components. This helps reduce further wear and noise caused by increased component gaps. Note: Under normal circumstances, if the owner notices increased fuel consumption, reduced power, or oil burning, these are signs of engine wear. It is recommended to switch to a suitable oil at this point.