The Difference Between 5W30 and 5W40 Engine Oil: Which Should Vehicles in Vietnam Choose?

# 5W30 vs 5W40 Engine Oil: Which Should You Choose for Your Vehicle?

5W30 and 5W40 are the two most common specifications for automotive engine oils and are highly favored in the market. However, what do these specifications mean, and if they differ by only 10 units after the "W" symbol, are they really that different? Should vehicles in Vietnam use 5W30 or 5W40 oil? Find out in the article below!

See also: Guide to Choosing Amsoil Engine Oil for Your Vehicle

Is There a Significant Difference in Quality Between 5W30 and 5W40 Engine Oils?

1. Individual Advantages of 5W30 and 5W40 Engine Oils

1.1 5W30 Engine Oil

5W30 is one of the most popular engine lubricants for automobiles today. Its main advantage is protecting and maintaining the optimal condition of engine components, keeping the engine running smoothly as if new. Beyond lubrication capability, renowned brands like Amsoil 5W30 LS Synthetic European Motor Oil also provide excellent fuel economy and superior cleaning with advanced additives in the formula.

• Some outstanding features of this engine oil are:
• Improved overall performance
• Excellent anti-wear protection
• Engine lubrication with superior component protection
• Suitable for both normal to severe driving conditions

Compatible with diesel engines, gasoline engines, and multi-valve fuel systems

5W30 engine oil is favored for its superior lubrication ability, excellent protection, and compatibility with various engines

1.2 5W40 Engine Oil

Many automotive oil distributors also stock 5W40 alongside 5W30. This is a conventional mineral-based engine oil most suitable for diesel engines and gasoline engines—the two most common engine types in automobiles today. 5W40 is typically used for new vehicle engines still under warranty.

• Some outstanding features of this oil are:
• Suitable for both unleaded and leaded gasoline fuel engines
• Low viscosity change during use
• Oil conservation
• Stable oil quality under all temperature conditions

Meets multiple oil quality certification standards

See also: What Makes Amsoil Imported Automotive Engine Oil Special?

5W40 engine oil offers high quality stability, fuel economy, and