AMSOIL 100% Synthetic High-Mileage Motor Oil reduced sludge by 67%,VV demonstrating its cleaning power that helps engines last longer and perform better.
AMSOIL Extended-Life Synthetic Motor Oil has 37% more cleaning power to help keep your engine running smoother, longer.UU
AMSOIL provides up to 16% better low-temperature viscosity than Mobil 1, * delivering better protection at startup.TT
Cold-Cranking Simulator ASTM D5293 (Lower = Better)
|AMSOIL 0W-20 100% Synthetic Hybrid Motor Oil||Mobil 1 0W-20 Hybrid Full Synthetic Motor Oil|
AMSOIL delivers outstanding protection in severe service.
AMSOIL CVT Fluid was installed in four Las Vegas taxis, each driven 100,000 miles. As shown in the belt photos below, AMSOIL CVT Fluid delivered outstanding protection in severe-service conditions.
AMSOIL provides better cold cranking viscosity, helping improve wear protection for engine components at startup.PP
ASTM D5293 Cold Crank (Lower = Better)
|AMSOIL Signature Series(5W-30)||Royal Purple High Performance (5W-30)||Lucas (5W-30)||Driven LS30 (5W-30)||Red Line High Performance (5W-30)||Royal Purple HPS (5W-30)|
|Cranking Viscosity (㎫ ●s)||3800||4500||5000||5750||6100||6100|
AMSOIL Signature Series is fortified with a heavy treatment of detergent additives, delivering
AMSOIL delivers powerful protection. How good is it?
An independent lab compared AMSOIL synthetic motor oil head-to-head against a leading competitor in a 100,000-mile test P. AMSOIL provided far superior wear protection and kept bearings looking like.
75% more engine protection against horsepower loss and wear.A
Sequence IVA Engine Test - Lower Number = Less Wear
|Industry Standard||AMSOIL Signature Series 0W-20 Synthetic Motor Oil|
|Average Cam Wear||90||20.28|
AMSOIL Synthetic Motor Oils achieved
Below is an example of piston damage due to an LSPI event observed during the testing of a competitor's motor oil. The red arrows indicate sections of the ring land that have broken away from the piston.
Signature Series controlled heat and minimized performance-robbing deposits on the turbo-bearing and shaft surfaces.
AMSOIL Signature Series Synthetic Motor Oil has
AMSOIL is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL
Sequence IIIH Engine Test (Lower Number = Better Viscosity Control)
|Industry Standard||AMSOIL Standard Length||AMSOIL Double Length|
|Viscosity Increase %||100%||0.1%||49.6%|
Even after doubling the length of the industry-standard test, AMSOIL delivered
Peugeot TU3M Wear Test (Lower Number = Less Wear)
|Industry-Standard Maximum Allowable Limit||AMSOIL OE 0W-20|
|Max Cam Wear (µm)||15||8|
Independent testing shows our Heavy-Duty Synthetic Diesel Oil delivers
DOMINATOR® Competition Diesel Oil delivers
High-Temperature/High-Shear (HTHS) Viscosity (Higher = Better Wear Protection)
|AMSOIL DOMINATOR® 20W-50 Diesel Oil||15W-40 Diesel Oil|
Heavy-Duty Synthetic Diesel Oil provides up to
Oil Consumption (Lower = Better)
|CK-4 Limit||AMSOIL Heavy-Duty||AMSOIL Signature-Series|
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides protection boosted to the max, delivering up to
Provides up to
Test results describe and represent properties of oils that were acquired on the dates listed in Table 1 (see www.amsoil.com/rusttest.aspx). Results do not apply to any subsequent reformulations of such oils or to new oils introduced after completion of testing. All oils were available to consumers at the time of purchase. Testing was completed in November 2017.
NMMA FC-W Rust Test (Lower Number = Less Wear)
|AMSOIL Signature Series 15W-40||Lucas* 15W-40||Schaeffers* Durability Advantage 15W-40||Shell* Rotella T4 15W-40||Mobil* Delvac 1300 Super 15W-40||Reference oil (pass/fail limit)|
|Max Cam Wear (µm)||17.25||33.63||39.5||30.63||36.69||30.75|
AMSOIL 0W-40 Signature Series Max-Duty Synthetic Diesel Oil delivers
AMSOIL resists viscosity breakdown
Viscosity Breakdown (Less Viscosity Loss = Better Protection)
|AMSOIL Synthetic V-Twin Motorcyle Oil||Harley-Davidson Screamin' Eagle SYN3|
|% Viscosity Loss in the CEC L45-KRL, ASTM D445 Test||-3.48||-25.32|
In industry-standard testing, AMSOIL Z-ROD® completely prevented rust formation while a leading competitor did not.JJ
AMSOIL Synthetic Marine Gear Lube delivers
Equipment using SABER Professional was
AMSOIL provides excellent clutch protectionT. How good is it? In extreme simulated-start testing, AMSOIL provided superior wear protection and kept clutch plates looking new.
AMSOIL INTERCEPTOR® Synthetic 2-Stroke Oil delivered
Filtering particles >20 microns fights engine wear.AA
AMSOIL delivers 18 percent more lubricity than Lucas* and 20 percent more than Sea Foam* for better retention of horsepower and fuel economy.R
Lubricity Performance (Measured by Wear Scar in Modified ASTM D6079, Smaller Number = Better Lubricity)
|Base Fuel (E10)||Lucas||Sea Foam||AMSOIL|
|Average Wear Scar (µm)||807 µm||786 µm||803 µm||640 µm|
AMSOIL P.i.® restores up to 14% horsepower.NN
|Pre-Cleaning Power||Post-Cleaning Power|
Testing reveals AMSOIL Diesel All-in-One provides
Lubricity Improvement (The lower the number, the better)
|ASTM D6079 Wear Scar Diameter Average um||Illinois||Delaware||Colorado||Washington||Tennessee||Texas||Pennsylvania||North Dakota||Wyoming|
|Fuel Treated with AMSOIL Diesel All-In-One||381||392||389||327||350||363||355||397||349|
Note: D975 industry diesel fuel standard requires fuel to be 520 or less EMA and Canada would like that to be 460 or less
AMSOIL provides corrosion protection Sea Foam* Motor Treatment can't match, helping maintain power and performance and keeping metal looking like new even when subjected to salt water.X
AMSOIL provides fuel stability that Sea Foam* Motor Treatment can't match, helping maintain startability and protect against the formation of varnish and gum.Z
Fuel Stability in the 24-Hour (1,440-minute) ASTM D525 Test
|Base Fuel||Sea Foam Motor Treatment®||AMSOIL Gasoline Stabilizer|
In independent, industry-standard testing, cast-iron and copper plates protected by AMSOIL showed virtually
In independent, industry-standard testing, cylinder liners protected by AMSOIL showed virtually
Fine-particle filtration down to 2 microns.
The AMSOIL Performance Test Archive documents the consistent high performance of AMSOIL synthetic lubricants throughout the company’s history. Enter the archive to review samples to review samples of past performance tests and technical studies.