DUNSHUN LUBRICANTSKnowledge Center
Practical engine-oil guides from the Dunshun blending floor — written for importers, fleet managers and workshop owners who need facts, not marketing.
- What 5W-30 Actually Measures Under SAE J300 — the "5W" and the "30" are two separate laboratory tests; here is what each one tells you.
- API SQ Explained: What Changed From SP, and Why It Matters for GDI Engines — the newest API gasoline category, LSPI, timing-chain wear and GPF/DPF compatibility.
Buying questions? The product overview maps every grade to its market, or contact us directly.