AMSOIL 5W-40 FS 100% SYNTHETIC EUROPEAN MOTOR OIL

AMSOIL 5W-40 FS 100% Synthetic European Motor Oil delivers the precise protection that European gasoline, diesel, and hybrid engines require, with a formulation built to handle long OEM drain intervals, turbocharger heat, and the strict emissions system demands of modern European vehicles.

European engines operate under a different set of rules than their domestic counterparts. Tighter tolerances, higher operating temperatures from widespread turbocharging, and extended service intervals of 10,000 miles or more put enormous stress on motor oil. Add in sensitive diesel particulate filters and catalytic converters that degrade quickly with the wrong oil chemistry, and the margin for error shrinks fast. A generic 5W-40 off the shelf is not engineered to manage all of these variables simultaneously.

SHEAR-STABLE PROTECTION ACROSS LONG DRAIN INTERVALS
European automakers design their service schedules around oils that maintain viscosity and film strength over thousands of miles. Oils that shear down lose their protective capacity well before the next scheduled change. AMSOIL 5W-40 European Motor Oil (EFM) uses shear-stable synthetic base oils that resist viscosity loss under sustained mechanical stress. With a high-temperature/high-shear viscosity of 4.0 cP (ASTM D5481), it maintains a durable lubricating film in the bearing surfaces and cylinder walls where protection matters most. That HTHS value exceeds the 3.5 cP minimum required by ACEA A3/B4, giving it meaningful headroom even as the oil ages.

TURBOCHARGER COOLING AND DEPOSIT RESISTANCE
Turbochargers in vehicles like the BMW 3 Series, VW Golf, Audi A4, and Mercedes-Benz C-Class generate extreme localized heat that can cook lesser oils into hard carbon deposits on the turbo shaft and bearings. AMSOIL EFM resists thermal breakdown with a flash point of 222°C (431.6°F) and Noack volatility of just 8.1% weight loss (ASTM D5800). Lower volatility means less oil is burned off at high temperatures, which translates to reduced oil consumption and fewer deposits inside the turbocharger housing. The result is a cleaner turbo and more consistent boost response over the life of the oil.

COLD-TEMPERATURE FLOW FOR STARTUP PROTECTION
Oil starvation at startup is one of the primary causes of accelerated wear in turbocharged engines. The turbo bearings rely on immediate oil flow, and thick oil in cold weather delays that flow. AMSOIL EFM posts a pour point of -39°C (-38.2°F) and a cold-crank simulator viscosity of 6,120 cP at -30°C (ASTM D5293), meaning it circulates quickly in cold conditions common across northern climates. For owners of Mercedes Sprinter vans, BMW X3s, and VW Passat TDIs in cold-weather states, this rapid flow at startup protects both the turbocharger and the main engine bearings before operating temperature is reached.

EMISSIONS SYSTEM COMPATIBILITY
Modern European diesels equipped with diesel particulate filters and European gasoline engines with three-way catalytic converters are highly sensitive to the sulfated ash, phosphorus, and sulfur content in motor oil. Too much SAPS accelerates DPF clogging and catalyst degradation. AMSOIL EFM is formulated with a carefully balanced SAPS profile appropriate for vehicles specifying ACEA A3/B3 and A3/B4 performance levels, protecting emissions hardware without compromising the anti-wear and detergency properties the engine needs.

SUPERIOR ENGINE CLEANLINESS
Sludge and varnish rob engines of efficiency and shorten component life. AMSOIL EFM's oxidation stability and detergency package actively prevent deposit formation on critical surfaces including piston ring grooves, valve stems, and oil passages. A total base number of 10.1 provides strong acid-neutralizing capacity, which is particularly relevant in diesel applications where combustion byproducts are more acidic. This keeps internal surfaces clean through the full length of the OEM drain interval.

SPECIFICATIONS AND COMPATIBILITY
AMSOIL 5W-40 FS 100% Synthetic European Motor Oil meets or exceeds the following specifications: API SN, SM; ACEA A3/B3, A3/B4; BMW LL-01; MB-Approval 229.5; Porsche A40; VW 502.00, 505.00; GM LL-B-025; Renault 0700, 0710. This makes it a direct fit for a wide range of European vehicles including the BMW 5 Series, Mercedes-Benz E-Class, Porsche Cayenne, VW Jetta, and Audi Q5. It is compatible with other synthetic and conventional motor oils, though mixing will reduce performance benefits and AMSOIL does not support extended drain intervals when oils have been mixed.

SERVICE LIFE
Recommended for the extended drain intervals established by the vehicle manufacturer. Change the oil filter at the time of each oil change.