Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.
See the Product Data Bulletin for full details.
Fights Engine Wear
- 75 percent more engine protection against horsepower loss and wear1 than required by the industry standard, extending the life of vital components like pistons and cams.
- Develops a strong fluid film that keeps metal surfaces separated.
- Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.
1Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
Signature Series Improves Startup Protection
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 |
PPBased on independent third-party testing in the industry-standard ASTM D5293 Cold Crank Simulator test as required by SAE J300.
*Trademark names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.
Signature Series Fights Wear
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 |
ABased on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
Signature Series Delivers Powerful Protection
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 new.
PTesting conducted in an independent lab using AMSOIL Signature Series 5W-30 Synthetic Motor Oil and a leading synthetic-blend 5W-30 motor oil in Ford F-150 trucks with 3.5L twin-turbo engines.
Signature Series Protects Against LSPI
AMSOIL Synthetic Motor Oils achieved 100% protection against LSPI.B
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.
BBased on zero LSPI events in five consecutive tests of AMSOIL Signature Series, XL and OE 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.
Signature Series Resists Viscosity Increase
Signature Series is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL delivered twice the viscosity control required by the standard.GG
Sequence IIIH Engine Test - Lower number = better viscosity control
| Industry Standard | AMSOIL 1X | AMSOIL 2X |
Viscotiy Increase % | 100% | 0.1% | 49.6% |
GGBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.
Signature Series Helps Keep Engines Cleaner
- Fortified with a heavy treatment of detergent additives, delivering 28% more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.LL
- 50% more detergentsD to help keep oil passages clean and promote oil circulation.
- Controls heat and minimizes performance-robbing deposits.
- Superior thermal durability that resists breakdown and keeps pistons clean.
- Provides 90% better protection against sludge.DD
The oil pick-up tube screen is virtually free of sludge.
LLBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased July 2020.
Dvs. AMSOIL OE Motor Oil
DDBased on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.
Signature Series Guards Turbos
Protects turbochargers 72% better than requiredC by the GM dexos1* Gen 2 specification.
CBased on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
Keeps Pistons Cleaner
Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.FF
FFBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.
Trusted by Professionals
Dedicated engine builders and mechanics put in long hours honing their craft. These architects of powerful, high-performance engines turn to Signature Series to protect their passion.
Hear what they have to say.
AMSOIL Safety Data Sheets (SDS)
Contact [email protected] if you're looking for a specific SDS that is not available on this page.
PRODUCT CODE - NAME | SDS |
ABC - Semi- Synthetic Bar & Chain Oil | |
ACB - Diesel Cetane Boost | |
ACLSC - Chain Lube - Aerosol | |
ADA – Slip Lock® Limited-Slip Additive | |
ADB – Diesel All-In-One | |
ADD – Diesel Cold Flow | |
ADF - Diesel Injector Clean | |
ADG - Heavy-Duty Degreaser | |
ADO - SAE 5W-40 Synthetic Heavy-Duty Diesel Oil | |
ADN - SAE 10W-30 Synthetic Heavy-Duty Diesel Oil | |
ADP - SAE 15W-40 Synthetic Heavy-Duty Diesel Oil | |
ADSP - Diesel Injector Clean + Cetane Boost | |
AED – Engine Degreaser | |
AEL - European Car Formula SAE 5W-30 Improved ESP Synthetic Motor Oil | |
AES - AMSOIL 5W-30 Small Engine Oil | |
AFF - Formula 4-Stroke® SAE 0W-40 Synthetic Power Sports Oil | |
AFL - European Car Formula SAE 5W-40 Improved ESP Synthetic Motor Oil | |
AGA - Gasoline Additive | |
AGC – Glass Cleaner | |
AGL – SEVERE GEAR® 80W-90 | |
AGM - SAE 75W-90 Synthetic Marine Gear Lube | |
AHF - SAE 20W-50 Synthetic Zero-Turn Hydrostatic Transmission Fluid | |
AIO - Injector Oil | |
AIR - Synthetic Air Tool Oil | |
ALM - Signature Series SAE 5W-20 Synthetic Motor Oil | |
ALS - Silicone Spray | |
AME - SAE 15W-40 Heavy Duty Synthetic Diesel & Marine Oil | |
AMH - Heavy-Duty Metal Protector | |
AMO - Premium Protection SAE 10W-40 Synthetic Motor Oil | |
AMP, CMP - Metal Protector | |
AMR - Signature Series SAE 5W-50 Synthetic Motor Oil | |
AMS– Mudslinger® | |
AMW- Miracle Wash® Waterless Wash & Wax | |
ANGS - SAE 20W-40 Synthetic Stationary Natural Gas Engine Oil | |
ANGV - SAE 15W-40 Synthetic Vehicular Natural Gas Engine Oil | |
ANT - Propylene Glycol Antifreeze & Coolant | |
ANTPC - AMSOIL Passenger-Car & Light-Truck Antifreeze & Coolant | |
ANTHD - AMSOIL Heavy-Duty Antifreeze/Coolant | |
AOB/COB - DOMINATOR® Octane Boost | |
APF - Power Foam | |
API - P.i. Performance Improver Gasoline Additive | |
AQS - Quickshot | |
ARO - Premium Protection SAE 20W-50 Synthetic Motor Oil | |
ART – Super Shift® Racing Transmission Fluid | |
ASE - AMSOIL SAE 10W-30 Small-Engine Oil | |
ASF - AMSOIL SAE 10W-40 Small-Engine Oil | |
ASL - Signature Series SAE 5W-30 Synthetic Motor Oil | |
ASM - Signature Series 0W-20 Synthetic Motor Oil | |
ASO - Formula 4-Stroke® SAE 10W-40 Synthetic Scooter Oil | |
AST - Gasoline Stabilizer | |
ATD - Torque-Drive® Synthetic Automatic Transmission Fluid | |
ATF - Signature Series Multi-Vehicle Synthetic Automatic Transmission Fluid | |
ATH - SAE 5W-30 Synthetic Tractor Hydraulic/Transmission Oil | |
ATL - Signature Series Fuel-Efficient Synthetic Automatic Transmission Fluid | |
ATM - Signature Series SAE 10W-30 Synthetic Motor Oil | |
AUDT - Synthetic ATV/UTV Transmission & Differential Fluid | |
AUPT - Synthetic ATV/UTV Powertrain Fluid | |
AUV40 - SAE 10W-40 Synthetic ATV/UTV Motor Oil | |
AUV50 - SAE 5W-50 Synthetic ATV/UTV Motor Oil | |
AWG – ISO-22 Synthetic Anti-Wear Hydraulic Oil | |
AWH – ISO-32 Synthetic Anti-Wear Hydraulic Oil | |
AWI – ISO-46 Synthetic Anti-Wear Hydraulic Oil | |
AZF - Signature Series SAE 0W-40 Synthetic Motor Oil | |
AZO - Signature Series SAE 0W-30 Synthetic Motor Oil | |
BFLV - DOT 3 and DOT 4 Synthetic Brake Fluid | |
BFR - DOMINATOR® DOT 4 Synthetic Racing Brake Fluid | |
BHO – Synthetic Biodegradable Hydraulic Oil | |
BPC - Brake Parts Cleaner | |
BRK - Break-in Oil SAE 30 | |
CTG - SAE 10W Synthetic Powershift Transmission Fluid | |
CTJ - SAE 30 Synthetic Powershift Transmission Fluid | |
CTL - SAE 50 Synthetic Powershift Transmission Fluid | |
CVT - Synthetic CVT Fluid | |
DB40 - SAE 10W-40 Dirt Bike Oil | |
DB50 - SAE 10W-50 Dirt Bike Oil | |
DB60 - SAE 10W-60 Dirt Bike Oil | |
DBTF - SAE 80 Synthetic Dirt Bike Transmission Fluid | |
DCK – ISO-100 Synthetic Diester Compressor Oil | |
DCL – ISO-150 Synthetic Diester Compressor Oil | |
DCO - 20W-50 DOMINATOR® Competition Diesel Oil | |
DCT - Synthetic Dual-Clutch Transmission Fluid | |
DEO - SAE 5W-40 Signature Series Max-Duty Synthetic Diesel Oil | |
DHD - SAE 5W-30 Signature Series Max-Duty Synthetic Diesel Oil | |
DME - SAE 15W-40 Signature Series Max-Duty Synthetic Diesel Oil | |
DRC - Diesel Recovery | |
DTT - SAE 10W-30 Signature Series Max-Duty Synthetic Diesel Oil | |
DZF - SAE 0W-40 Signature Series Max-Duty Synthetic Diesel Oil | |
EAL - Engine Assembly Lube | |
EFM - European Car Formula SAE 5W-40 Classic ESP Synthetic Motor Oil | |
EFO - European Car Formula SAE 0W-40 Classic ESP Synthetic Motor Oil | |
FCPCN - AMSOIL Firearm Cleaner and Protectant | |
FCPSC - AMSOIL Firearm Cleaner and Protectant (aerosol) | |
FGO - SAE 80W-140 Synthetic Gear Lube | |
FGR - SAE 75W-90 Synthetic Gear Lube | |
FLP - Synthetic Firearm Lubricant | |
FLPSC - Synthetic Firearm Lubricant (aerosol) | |
FLSH - Engine and Transmission Flush | |
FOGSC - Engine Fogging Oil | |
FTF - SAE 50 Long-Life Synthetic Transmission Oil | |
GBS - Briggs & Stratton 4T Racing Oil | |
GLC - Synthetic Multi-Purpose Grease | |
GPOR1 - Synthetic Polymeric Off-Road Grease, NLGI #1 | |
GPOR2 - Synthetic Polymeric Off-Road Grease, NLGI #2 | |
GPTR1 - Synthetic Polymeric EP Grease NLGI #1 | |
GPTR2 - Synthetic Polymeric EP Grease NLGI #2 | |
GRG - DOMINATOR® Synthetic Racing Grease | |
GSF - Semi-Fluid Synthetic EP Grease | |
GSPSC - Spray Grease | |
GVC - High-Viscosity Lithium-Complex Synthetic Grease | |
GWR - Synthetic Water-Resistant Grease | |
GXC - X-Treme Synthetic Food-Grade Grease | |
HDD - SAE 5W-30 Series 3000 Synthetic Heavy-Duty Diesel Oil | |
HVG – ISO-22 Synthetic Multi-Viscosity Hydraulic Oil | |
HVH – ISO-32 Synthetic Multi-Viscosity Hydraulic Oil | |
HVI – ISO-46 Synthetic Multi-Viscosity Hydraulic Oil | |
HVJ – ISO-68 Synthetic Multi-Viscosity Hydraulic Oil | |
MC3 - 4T Performance SAE 10W-30 Synthetic 4-Stroke Motorcycle Oil, (International Only) | |
MC4 - 4T Performance SAE 10W-40 Synthetic 4-Stroke Motorcycle Oil, (International Only) | |
MC5 - 4T Performance SAE 20W-50 Synthetic 4-Stroke Motorcycle Oil, (International Only) | |
MCF - SAE 10W-40 Synthetic Metric Motorcycle Oil | |
MCS - SAE 60 Synthetic V-Twin Motorcycle Oil | |
MCT - SAE 10W-30 Synthetic Metric Motorcycle Oil | |
MCV - SAE 20W-50 Synthetic V-Twin Motorcycle Oil | |
MFF - SAE 15W-50 Synthetic Metric Motorcycle Oil | |
MOB – Motorcycle Octane Boost | |
MTF – Synthetic Manual Synchromesh Transmission Fluid | |
MTG - Synthetic Manual Transmission and Transaxle Gear Lube | |
MVI - SAE 20W-40 Synthetic V-Twin Motorcycle Oil | |
MVP - Synthetic V-Twin Primary Fluid | |
MVT - Synthetic Motorcycle V-Twin Transmission Fluid | |
OEB - OE SAE 5W-40 Synthetic Motor Oil (International Only) | |
OEF - OE SAE 5W-30 Synthetic Motor Oil | |
OEM - OE SAE 5W-20 Synthetic Motor Oil | |
OER - OE SAE 20W-50 Synthetic Motor Oil (International Only) | |
OES - OE SAE 0W-16 Synthetic Motor Oil | |
OET - OE SAE 10W-30 Synthetic Motor Oil | |
OEZ - OE SAE 0W-20 Synthetic Motor Oil | |
OTF - OE Multi-Vehicle Synthetic Automatic Transmission Fluid | |
OTL - OE Fuel-Efficient Synthetic Automatic Transmission Fluid | |
P300 – Extreme Power SAE 0W-30 Synthetic Motor Oil (International Only) | |
P400 – Extreme Power SAE 0W-40 Synthetic Motor Oil (International Only) | |
PCH – ISO-32 Synthetic Compressor Oil | |
PCI – ISO-46 Synthetic Compressor Oil | |
PCJ – ISO-68 Synthetic Compressor Oil | |
PCK – ISO-100 Synthetic Compressor Oil | |
PSF - Synthetic Power Steering Fluid | |
RCH - ISO-32 Synthetic R&O Gear, Bearing & Compressor Oil | |
RCI - ISO-46 Synthetic R&O Gear, Bearing & Compressor Oil | |
RCJ - IS0-68 Synthetic R&O Gear, Bearing & Compressor Oil | |
RCK - IS0-100 Synthetic R&O Gear, Bearing & Compressor Oil | |
RCL - ISO-150 Synthetic R&O, AW Gear & Bearing Oil | |
RCM - ISO-220 Synthetic R&O, AW Gear & Bearing Oil | |
RCN – ISO-320 Synthetic R&O Gear, Bearing & Compressor Oil | |
RCO – ISO-460 Synthetic R&O Gear, Bearing & Compressor Oil | |
RCP – ISO-680 Synthetic R&O Gear, Bearing & Compressor Oil | |
RD20 - DOMINATOR® SAE 5W-20 Synthetic Racing Oil | |
RD30 - DOMINATOR® SAE 10W-30 Synthetic Racing Oil | |
RD50 - DOMINATOR® SAE 15W-50 Synthetic Racing Oil | |
RD60 - DOMINATOR® SAE 60 Synthetic Racing Oil | |
RDCB - DOMINATOR® Coolant Boost | |
SEI - SIROCCO™ ISO-32/46 Synthetic Compressor Oil | |
SGJ - ISO-68 Synthetic Extreme-Pressure Gear Oil | |
SGK - ISO-100 Synthetic Extreme-Pressure Gear Oil | |
SGL - ISO-150 Synthetic Extreme-Pressure Gear Oil | |
SGM - ISO-220 Synthetic Extreme-Pressure Gear Oil | |
SGN - ISO-320 Synthetic Extreme-Pressure Gear Oil | |
SGO - ISO-460 Synthetic Extreme-Pressure Gear Oil | |
SGP - ISO-680 Synthetic Extreme-Pressure Gear Oil | |
SRN – SEVERE GEAR® SAE 190 Extreme Pressure Synthetic Racing Gear Lubricant | |
SRT – SEVERE GEAR® SAE 250 Extreme-Pressure Synthetic Racing Gear Lubricant | |
STL - Shock Therapy® Light #5 Synthetic Suspension Fluid | |
STM - Shock Therapy® Medium #10 Synthetic Suspension Fluid | |
SVG – SEVERE GEAR® SAE 75W-90 Synthetic Gear Lube | |
SVT – SEVERE GEAR® SAE 75W-110 Synthetic Gear Lube | |
SVO – SEVERE GEAR® SAE 75W-140 Synthetic Gear Lube | |
TCC - Synthetic Chaincase & Gear Oil | |
TDR - DOMINATOR® Synthetic 2-Stroke Racing Oil | |
WCF - SAE 10W-40 Synthetic Marine Oil | |
WCM - SAE 25W-40 Synthetic-Blend Marine Oil | |
WCT - SAE 10W-30 Synthetic Marine Oil | |
XLF - XL SAE 5W-30 Synthetic Motor Oil | |
XLM - XL SAE 5W-20 Synthetic Motor Oil | |
XLO - XL SAE 10W-40 Synthetic Motor Oil | |
XLT - XL SAE 10W-30 Synthetic Motor Oil | |
XLZ - XL SAE 0W-20 Synthetic Motor Oil | |
ZRD – AMSOIL Z-ROD® 10W-40 Synthetic Motor Oil | |
ZRF – AMSOIL Z-ROD® 10W-30 Synthetic Motor Oil | |
ZRT – AMSOIL Z-ROD® 20W-50 Synthetic Motor Oil | |