Premium synthetic formulation designed for the unique demands of European engines. Protects advanced emissions systems. Excellent for both gasoline and diesel engines. Fights sludge for superior engine cleanliness. Outstanding all-season performance. Designed for the extended drain intervals established by European car manufacturers. Excellent for turbochargers.
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Product data sheets
View, download, or save a copy of the Product Data Sheet or Safety Data Sheet for AMSOIL 5W-40 FS 100% Synthetic European Motor Oil.
AMSOIL 5W-40 FS 100% Synthetic European Motor Oil is a full-SAPS 5W-40 formulation built for European gasoline performance engines and older European turbo-diesels that do not run a diesel particulate filter. The 5W-40 grade carries the high-temperature operating viscosity and HTHS reserve required by ACEA A3/B4 service, paired with shear-stable synthetic base oils and a robust anti-wear additive package.
Full-SAPS additive chemistry for European performance engines
The 5W-40 FS formula is a full-SAPS chemistry, meaning it retains the higher sulfated ash, phosphorus, and sulfur levels that ACEA A3/B3 and A3/B4 categories were designed around. This SAPS profile is intentional for engines that do not run a diesel particulate filter or gasoline particulate filter, where ash-restricted formulations would sacrifice the additive density needed for BMW, Mercedes-Benz, Porsche, and VW high-output service.
OEM approvals across BMW, Mercedes-Benz, Porsche, VW, and GM Europe
5W-40 FS is recommended for European gasoline and diesel engines requiring API SN or SM, ACEA A3/B3 or A3/B4, BMW Longlife-01, Mercedes-Benz Approval 229.5, Porsche A40, Volkswagen 502.00 or 505.00, GM LL-B-025, or Renault RN0700 or RN0710. Each of these specifications is tied to its own laboratory engine tests, sludge cycles, and high-temperature deposit protocols.
HTHS viscosity and high-temperature film strength
High-Temperature High-Shear viscosity is 4.0 cP at 150 degrees C (ASTM D5481), keeping the hydrodynamic oil film intact under high-load bearing conditions and sustained autobahn-style operation. Kinematic viscosity at 100 degrees C is 14.6 cSt with a Viscosity Index of 173 (ASTM D445, ASTM D2270), placing the formula firmly in the stay-in-grade band that ACEA A3/B4 demands.
Turbocharger protection and low NOACK volatility
A NOACK volatility of 8.1 percent weight loss (ASTM D5800) helps the formula resist boil-off at turbocharger bearing temperatures, reducing the deposit precursors that drive turbo coking and oil thickening. The thermally stable synthetic base stock continues to flow through hot turbo housings on shutdown, and a -39 degrees C pour point (ASTM D97) supports rapid oil pressure rise at cold start.
Sludge control and acid neutralization for extended drains
A Total Base Number of 10.1 provides reserve alkalinity to neutralize combustion acids over the extended drain intervals European manufacturers schedule. The detergent and dispersant package targets sludge and varnish precursors in direct-injection turbocharged engines that run aggressive cold-start enrichment, fuel dilution, and EGR loops.
Recommended applications and service intervals
5W-40 FS is recommended for European gasoline engines and older European turbo-diesels that call for a 5W-40 meeting any of the ACEA or OEM specifications listed above. Match the right product with the AMSOIL Vehicle Lookup Guide before ordering, and follow the manufacturer service schedule for the engine.
Normal and severe service: follow the extended drain intervals established by the vehicle manufacturer, and replace the oil filter at every oil change.
Aftertreatment exclusion: not intended for late-model European diesels equipped with DPF aftertreatment that require a mid-SAPS ACEA C3 oil; an AMSOIL 5W-40 MS or 5W-30 LS European Motor Oil is the correct choice in that case.
Mixing: compatible with other synthetic and conventional motor oils, but mixing shortens service life and the extended drain interval is not supported with mixed oil.
Modified, racing, or alternative-fuel engines: confirm the engine builder accepts an ACEA A3/B4 full-SAPS 5W-40 before use.
AMSOIL Oil Filters are recommended to take full advantage of the manufacturer drain interval, and aftermarket oil additives are not recommended for use with AMSOIL synthetic motor oils since the additive system is already balanced for European service.
Typical technical properties
Property
Value
Kinematic Viscosity at 100 degrees C (ASTM D445)
14.6 cSt
Kinematic Viscosity at 40 degrees C (ASTM D445)
88.5 cSt
Viscosity Index (ASTM D2270)
173
CCS Viscosity at -30 degrees C (ASTM D5293)
6,120 cP
HTHS Viscosity at 150 degrees C (ASTM D5481)
4.0 cP
NOACK Volatility, weight loss (ASTM D5800)
8.1 percent
Pour Point (ASTM D97)
-39 degrees C (-38.2 degrees F)
Flash Point (ASTM D92)
222 degrees C (431.6 degrees F)
Fire Point (ASTM D92)
236 degrees C (456.8 degrees F)
Total Base Number
10.1
Order AMSOIL 5W-40 FS 100% Synthetic European Motor Oil
5W-40 FS is stocked in a quart bottle (product code EFMQT-EA), a case of 12 quarts (EFMQT-CA), a one-gallon jug (EFM1G-EA), a 55-gallon drum (EFM55-EA), and a 275-gallon tote (EFM27-EA). Using AMSOIL synthetic lubricants does not void a new vehicle or equipment manufacturer warranty, and all AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty. Match the right product with the AMSOIL Vehicle Lookup Guide, compare European, Signature Series, and OE positioning in the AMSOIL Car Oil Guide, then order AMSOIL 5W-40 FS 100% Synthetic European Motor Oil.
For 20 years I am using the Amsoil and will mot use anything else. I owned many (more than 20) different cars during these years and always used Amsoil. My mechanic wouldn’t believe I was really planning to change the oil every 10 or 25 k miles, but after changing it couple of times and seeing the condition of the used oil and my engine now he is not surprised anymore .
What does FS mean in AMSOIL 5W-40 FS European Motor Oil?
FS stands for full-SAPS, a chemistry that retains higher levels of sulfated ash, phosphorus, and sulfur than the mid-SAPS or low-SAPS European oils. This profile is intended for ACEA A3/B3 and A3/B4 service in European gasoline engines and diesels that do not run a particulate filter, where the higher additive density is needed to handle high-output operation and extended drain intervals.
Which OEM approvals does AMSOIL 5W-40 FS carry?
5W-40 FS is recommended for engines requiring API SN or SM, ACEA A3/B3 or A3/B4, BMW Longlife-01, Mercedes-Benz Approval 229.5, Porsche A40, VW 502.00 or 505.00, GM LL-B-025, or Renault RN0700 or RN0710. The owner manual should list one of these specifications before the oil is used.
Is AMSOIL 5W-40 FS safe to use in a diesel engine with a DPF?
No. 5W-40 FS is a full-SAPS chemistry intended for European gasoline engines and older diesels without a diesel particulate filter. European diesels equipped with a DPF typically require a mid-SAPS or low-SAPS ACEA C3 oil instead, and using a full-SAPS oil in that hardware accelerates ash loading of the filter.
Does AMSOIL 5W-40 FS meet Porsche A40 and Mercedes-Benz 229.5?
Yes. 5W-40 FS is recommended for engines requiring Porsche A40 and Mercedes-Benz Approval 229.5. Both approvals describe a 5W-40 high-performance gasoline category with high-temperature deposit, oxidation, and shear-stability requirements suited to BMW M-series, Porsche, AMG, and turbocharged Mercedes platforms that predate DPF aftertreatment.
How long can AMSOIL 5W-40 FS stay in service?
5W-40 FS is recommended for the extended drain intervals established by the vehicle manufacturer, with the oil filter replaced at every oil change. The European service schedule (often tied to a flexible service indicator that reads load, temperature, and idle time) sets the interval for a given engine.
What is the cold-start performance of AMSOIL 5W-40 FS?
Cold-Crank Simulator viscosity is 6,120 cP at -30 degrees C (ASTM D5293) and the pour point is -39 degrees C / -38.2 degrees F (ASTM D97). These figures meet the 5W winter rating and support rapid oil delivery to turbocharger bearings, timing-chain tensioners, and variable valve timing actuators at cold start.
Will using AMSOIL 5W-40 FS void a new vehicle warranty?
No. Using AMSOIL synthetic lubricants does not void a new vehicle or equipment manufacturer warranty, and all AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty.
