Liqui Moly Molygen New Generation 5W-40 Full Synthetic Motor Oil

Molygen 5W-40 carries MB 229.5 (older Mercedes-Benz passenger cars), BMW Longlife-01 (pre-2018 BMW models that specified LL-01, not LL-04 or LL-17 FE), Porsche A40, and VW 502 00/505 00 approvals. If your BMW was manufactured after 2018 or requires LL-04, LL-14 FE+, or LL-17 FE specification, this oil does not meet that requirement. Check your owner's manual for the exact OEM approval code required.

MFC stands for Molecular Friction Control — a proprietary Liqui Moly additive technology based on tungsten and molybdenum compounds. These molecules form a protective layer on metal surfaces to reduce friction losses. The tungstate compounds have naturally fluorescent properties when excited by UV light, which also enables UV leak detection after an oil change. The green color is the tungstate additive, not a dye.

No. Molygen 5W-40 is certified to API SN, which was superseded by API SP in 2020. API SP adds improved deposit control, oxidation stability, and chain wear protection for engines with GDI (gasoline direct injection) and turbochargers. Owners of 2020+ vehicles with API SP requirements should confirm with their dealer before using this oil — Molygen 5W-40 is best suited to vehicles that specify ACEA A3/B4 with the listed OEM approvals.

Liqui Moly's product guidance advises against mixing Molygen with additional friction-modifier additives such as Cera Tec or MoS2. The MFC additive package is already formulated into the oil, and adding external friction modifiers could affect the additive balance and potentially void performance claims.

Liqui Moly's product page carries a California Proposition 65 warning for naphthalene — a polycyclic aromatic hydrocarbon that the state of California identifies as a known carcinogen. This warning applies to the oil as sold and reflects the composition of the petroleum-base stock. The warning is relevant to routine handling during oil changes (skin contact, inhalation of vapor at elevated temperatures). Used oil also carries used-oil-specific hazards unrelated to this classification.