Product Details

• Article Number: 21150 — Liqui Moly KFS 11 (Kühlerfrostschutz 11 — German for "Radiator Frost Protection 11") G11 coolant concentrate. The premium German-manufactured option in the G11 coolant tier, positioned above generic budget brands and matching factory-fill specifications across multiple premium platforms.
• Capacity: 5 litres — bulk concentrate canister. Depending on dilution ratio chosen, produces between 7.7L and 14.3L of finished ready-to-use coolant. Sufficient for a complete cooling system flush on most passenger vehicles, with reserve for top-ups.
• Specification: G11 — silicate-based inhibitor coolant chemistry. The traditional industrial-strength coolant standard, offering robust corrosion protection for cast iron and aluminium cooling system components.
• Colour: Green — distinctive green colour aids visual inspection and identification. Do NOT mix G11 with G12/G12+ coolants (red/pink) — incompatible chemistries cause gel formation and cooling system blockages.
• Properties: Concentrate — MUST be diluted with deionised water before use. NEVER pour neat concentrate directly into the cooling system.
• Mixing Ratios — Flexible Freeze Protection:
  • 35% concentrate / 65% water → -20°C protection (mild climate use)
  • 50% concentrate / 50% water → -40°C protection (standard recommendation, most climates)
  • 65% concentrate / 35% water → -68°C protection (extreme cold climates / arctic use)
• Manufacturer Recommendations: Fiat 9.55523, BMW GS 94000, Chrysler MS-7170, Cummins 85T8-2, DQC CA-14, Iveco 18-1830, JI Case JIC-501, MAN 324 NF, MB 325.0, MB 325.2, MTU MTL 5048, GM GME L 46014, Volvo 128 6083, Volvo Trucks — comprehensive multi-OEM approval list covering passenger cars, commercial trucks, agricultural machinery, and construction equipment.
• OEM Cross-References: 002, Alfa Romeo 9.55523, Audi TL-774 C = G11, Avtovaz TTM VAZ 1.97, Behr, BMW GS 94000, Chrysler MS-7170, Construction, Cummins 85T8-2, Deutz DQC CA-14, Fiat 9.55523, IVECO 18-1830, JI Case JIC-501, Lada, Lancia 9.55523, MAN 324 Typ NF, MB 325.0 (and additional cross-references).
• Product Line: KFS 11 — Liqui Moly's flagship G11 coolant line, the industrial-grade German-manufactured coolant trusted across European markets.
• Packing Type: Canister — durable rigid plastic 5-litre canister with sealed pour spout for controlled pouring.
• Vehicle Type: Car (also approved for commercial trucks and industrial equipment via the OEM approval list).
• Vehicle Compatibility: Universal — suitable for any petrol, diesel, or commercial vehicle requiring G11-spec silicate coolant. Particularly well-validated for older BMW (GS 94000 spec), Mercedes-Benz (MB 325.0), Audi/VAG (TL-774 C), and commercial truck applications. Always verify your vehicle's cooling system specification before mixing with existing coolant.
• Use Case: Premium-tier workshop choice for full system coolant flushes on European-manufactured vehicles. The flexible mixing ratio makes this exceptionally versatile — single product covers mild-climate top-ups (35/65 mix) through to arctic operating conditions (65/35 mix).
• Important Mixing Note: Concentrate MUST be mixed with deionised water (NOT tap water). Tap water contains minerals (calcium, magnesium) and chlorides that cause cooling system corrosion and scale buildup, defeating the protective additives in the coolant.
• Manufacturer: LIQUI MOLY — German lubricant manufacturer founded 1957, headquartered in Ulm. Recognised globally as a top-tier premium oil, coolant, and additive brand. KFS 11 is a flagship product in the Liqui Moly fluid range.
• EAN: 4100420211508

‍