What is the Difference Between 5W-40 and 5W-30?
1 Answers
The main difference between 5W-30 and 5W-40 is that 5W-30 has relatively better fluidity, which more effectively reduces fuel consumption and allows the engine to dissipate heat faster and more efficiently. However, for some older vehicles, using 5W-30 may result in slightly louder engine noise. Additionally, engines that strictly require 5W-40 may experience higher-than-normal fuel consumption if 5W-30 is used instead. Under high-temperature conditions, 5W-40 offers better oil stability. Additional information is as follows: 1. Definition: Engine oil, also known as engine lubricant, has a density of approximately 0.91×10³ (kg/m³). It serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. It is often referred to as the 'blood' of a car. Engine oil consists of base oil and additives. The base oil is the primary component of the lubricant, determining its fundamental properties, while additives compensate for and enhance the performance of the base oil, providing additional characteristics. 2. Features: The engine is the heart of a car, containing many metal surfaces that move against each other under high-speed and harsh conditions, with operating temperatures reaching 400°C to 600°C. Advanced technology can convert natural gas into crystal-clean, fully synthetic base oil, which, when combined with proprietary cleaning technology, creates lubricants with superior cleaning and protective performance.
