Lubricants — Technical & Standards
API, ACEA, ILSAC, SAE and base-oil fundamentals, plus spec-to-oil decision guides for B2B buyers.
73 articles · Newest first
Why Engine Oil Can Leave the Sump Thinner Than It Went In
Last verified: 2026-07-29 Suppose a sample is drawn from a sump that has been running a wide-spread multigrade, and it reads thinner…
CVT Fluid Specifications Beyond Nissan NS-2/NS-3: What Honda, Subaru, Mitsubishi and Hyundai Actually Specify
Last verified: 2026-07-29 Suppose a workshop reports a CVT that shudders under light acceleration — the revs climb, road speed lags a…
What JASO M345:2024 Actually Tests in a Two-Stroke Oil: The Four Test Methods Behind FB, FC and FD
Last verified: 2026-07-28 No — a JASO FD oil is not required to be any more lubricating than a JASO FB oil.…
Selecting Tractor UTTO/STOU Viscosity for Hot-Climate Export vs Cold-Start Markets
Last verified: 2026-07-28 Ship the wrong UTTO/STOU viscosity to the wrong destination and the failure rarely announces itself at the port. Suppose…
Anti-Shudder Test Methods for Transmission Fluid: What a “Meets the Specification” Claim Does Not Prove
Last verified: 2026-07-27 Procurement documentation often treats "anti-shudder tested" as one claim, backed by one number, from one test. It is not.…
Re-Refined Base Oils Explained: API Group Classification, the Re-Refining Process and How to Verify Quality for Procurement
Last verified: 2026-07-27 In December 2025, the ATIEL Code of Practice reached Issue 26 and — according to industry reporting of the…
Fuel Dilution in Engine Oil: Causes, Detection Methods, and Acceptable Limits
Last verified: 26 July 2026 There is no such thing as a universal acceptable limit for fuel dilution in engine oil. Not…
Synthetic vs Mineral Automotive Gear Oil: Base-Oil Performance and Sourcing Comparison
Last verified: 2026-07-25 What does a gear-oil data sheet actually tell you? Open a real automotive gear-oil technical data sheet and look…
Why Lubricants Turn Black: Normal Soot Loading vs an Oxidation Warning Sign
Last verified: 2026-07-24 Picture two oil samples on a bench, drawn from two different machines. Both are the color of strong coffee.…
Diagnosing Foaming and Air Entrainment in Hydraulic and Gear Oils
Last verified: 2026-07-23 Suppose a maintenance engineer walks past a hydraulic power unit on an ordinary morning and sees a collar of…
What Happens If You Accidentally Mix GL-4 and GL-5 Gear Oil in the Same Gearbox?
Last verified: 2026-07-23 Most people who have just discovered the wrong bottle went into a gearbox reach for arithmetic: how much got…
Lubricant Selection for Hot Climates: Viscosity, Oxidation Life, and Storage in High-Ambient-Temperature Operations
Last verified: 22 July 2026 Suppose a container sits on a yard in a hot-climate port through a stretch of the dry…