Blog
API GL-4 vs GL-5 Gear Oil: Which One Should You Choose?
API GL-4 and GL-5 gear oils serve different mechanical purposes. This article explains their key differences, additive chemistry, and how to choose the correct specification ...
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Gear Oil vs Transmission Oil: What’s the Difference?
Gear oil and transmission oil serve different mechanical purposes. This article explains their key differences, why they are not interchangeable, and how using the wrong ...
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What Is Gear Oil and What Is It Used For?
Gear oil is a specialized lubricant designed to protect gears under high load and pressure. This article explains what gear oil is, what it is ...
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Understanding Base Oils: Group I, II, III, IV & V Explained
Base oils form the foundation of engine oil performance. This article explains Group I, II, III, IV, and V base oils, highlighting their key differences ...
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Why Engine Oil Fails Prematurely: Oxidation, Contamination & Shear Loss
Engine oil can fail long before its intended service interval. This article explains the three main causes of premature engine oil failure—oxidation, contamination, and shear ...
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How Engine Oil Standards Evolve: From API SN to SP & CK-4
Engine oil standards evolve to meet changing engine technologies and emissions requirements. This article explains how API standards progressed from SN to SP and CK-4, ...
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How Engine Oil Quality Is Tested: Viscosity, Oxidation & Wear Protection
Engine oil quality depends on measurable performance, not marketing claims. This article explains how viscosity accuracy, oxidation stability, and wear protection are tested to evaluate ...
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What Makes an Engine Oil Suitable for Hot Climate Countries?
High ambient temperatures place extra stress on engine oil. This article explains what makes an engine oil suitable for hot climate countries, focusing on viscosity ...
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Engine Oil for High-Mileage Engines: What Makes the Difference?
High-mileage engines face different lubrication challenges than newer ones. This article explains what changes inside older engines and how high-mileage engine oils are formulated to ...
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5W-30 vs 10W-40 Engine Oil: Differences, Uses & Climate Suitability
5W-30 and 10W-40 are two of the most commonly used engine oil grades. This article explains their key differences, typical applications, and climate suitability to ...
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How Engine Oil Formulation Affects Long-Term Engine Protection
Engine oil formulation plays a critical role in long-term engine protection. This article explains how base oils, additive chemistry, and formulation balance influence wear resistance, ...
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Common Engine Oil Mistakes Distributors Make When Sourcing from China
Sourcing engine oil from China offers cost advantages, but also hidden risks. This article outlines the most common mistakes distributors make when sourcing engine oil ...
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About Us
YEFE is a professional lubricant manufacturer with advanced R&D, automated production, and strict quality control. We provide reliable automotive and industrial lubrication solutions, along with OEM and private label services for global partners.