In-depth analysis of 10W30 oil
10W30 is a multi-grade viscosity motor oil, classified as an all-season universal lubricant suitable for various climatic conditions and vehicle type.
For an explanation of motor oil viscosity ratings, please refer to our previous article:How to Choose Engine Oil? A Detailed Selection Guide | TERZO NEWS blog
10W30 is suitable for a limited range of vehicle types, primarily small-displacement naturally aspirated engines, such as 1.6L or smaller passenger cars and compact SUVs. These vehicles have lower viscosity requirements, and 10W-30 can meet their lubrication needs. It is also suitable for motorcycles/scooters, especially small-displacement scooters, as it balances cold-start performance and high-temperature lubrication. Finally, there are some older vehicles with high mileage and engine wear. The viscosity of 10W-30 can enhance sealing and reduce the risk of leak.
However, if your vehicle has a turbocharged engine, I do not recommend using 10W30 oil. The primary reason is closely related to the high-temperature, high-pressure operating environment and lubrication requirements of turbocharged engine.
When a turbocharged engine is operating, the turbocharger can spin at over 100,000 RPM, with cylinder temperatures exceeding 120°C and pressure significantly higher than in naturally aspirated engines. In such conditions, the oil must have high-temperature stability, shear resistance, and rapid heat dissipation capabilities. However, 10W-30 oil has a lower viscosity at high temperatures and may not meet these requirement.
However, in some cases, turbocharged vehicles (such as certain older models or low-power versions) may allow the use of 10W30 oil, provided the following conditions are met:
The vehicle manufacturer's manual explicitly recommends this viscosity;
The vehicle has not been modified and is used in a mild environment (e.g., average annual temperature between 5°C and 30°C):
The oil change interval is regularly shortened to within 7,500 kilometer.
Turbocharged engines, due to their harsh operating conditions, generally do not suit 10W-30 oil. Naturally aspirated engines can refer to the owner's manual for selection.
