For use in both diesel and gasoline engines. Ideal for applications where the extra protection of a higher-viscosity oil is desired. The higher viscosity may help reduce motor oil consumption in equipment experiencing higher than normal oil usage rates while running lower viscosity lubricants.
AMSOIL Premium Protection Synthetic Motor Oil is formulated to provide superior protection and performance in a wide variety of demanding applications. Its unique combination of synthetic base oils and a superior additive package results in a formulation that exceeds the requirements of most gasoline or diesel applications that call for 10W-40 or 20W-50 motor oil. Premium Protection Synthetic Motor Oil is ideal for high-mileage vehicles and high-stress vehicles subject to hot temperatures, heavy hauling, trailer pulling or off-road use. It provides the extra anti-wear protection required by engines with flat-tappet cams and high-tension valve springs. AMSOIL Premium Protection Synthetic Motor Oil offers flexibility and performance beyond conventional oils.
AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your engine.
- High-zinc formula guards against wear
- Ideal for flat-tappet cams
- Resists deposits to help keep engines clean
- Convenience of use for gas and diesel engines
Excellent Protection Against Wear
Premium Protection Synthetic Motor Oil is high-viscosity oil engineered to protect against metal-to-metal contact. It resists viscosity loss due to shear and is formulated with a heavy treatment of zinc and other anti-wear additives for excellent protection of gears, bearings, cam lobes and other high-pressure components in engines and transmissions. Premium Protection Synthetic Motor Oil helps extend equipment life.
Premium Protection Synthetic Motor Oil contains no friction modifiers, making it ideal for motorcycles, maintenance equipment and other wet-clutch transmission applications. Formulated to prevent clutch glazing and slippage, it helps ensure smooth clutch engagement and long-term, dependable transmission operation. Premium Protection Synthetic Motor Oil reduces clutch wear for extended transmission life.
High-Temperature Breakdown and Oxidation Protection
Premium Protection Synthetic Motor Oil is formulated to overcome the thermal deficiencies common to conventional petroleum oils. Volatilization (burn-off), oxidation and excessive deposit formation from high heat are greatly reduced. Viscosity thickening is controlled and engines run cleaner, promoting cooler operation and long engine life in air- or liquid-cooled engines. In addition, the higher viscosity of AMSOIL 20W-50 Synthetic Motor Oil may help reduce motor oil consumption in equipment that experiences higher-than-normal usage rates when lower-viscosity lubricants are installed.
Increases Time Between Oil Changes in Diesel and Gasoline Engines
Superior synthetic base oil and additive technology exceeds the requirements of both gasoline and diesel engines. Premium Protection Motor Oil is designed to neutralize acids, disperse soot and last longer in service than conventional oils.
AMSOIL Premium Protection Synthetic Motor Oil is recommended for air- and liquid-cooled, large or small gasoline and diesel engines, transmissions and chaincase applications where 10W-40 oils are required with any of the following specifications:
- API SL, SJ, SH, SG
- API CI-4+, CI-4, CH-4, CF, CF-2
- Caterpillar* ECF-1
- JASO MA (Motorcycle)
- MAN* 271/3275
- MTU Type 2
- Cummins* 20071/20072/20076/20077
- Volvo*, VDS-2, VDS
- Mack* EO-M+, EO-M
- ACEA A3/B3, E3, E5
- MB 228.1, 228.3, 229.1
- Detroit Diesel* 93K214
AMSOIL Synthetic 10W-40 Premium Protection Motor Oil is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives are not recommended for use with AMSOIL Synthetic Oils.
AMSOIL Synthetic 10W-40 Premium Protection Motor Oil is recommended for extended intervals in unmodified, mechanically-sound vehicles or equipment as follows:
Diesel Engine Service
- Normal Service – Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
- Severe Service – Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.
Gasoline Engine Service
- Normal and Severe Service – Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.
Motorcycles, Small Engines, Stationary Engines, Heavy Equipment and Other Applications
- Extend drain intervals based on oil analysis or follow the manufacturer-recommended drain interval.
AMSOIL Ea Full-Flow Oil Filters are designed for extended drain intervals. They stop smaller particles, flow more oil and last longer than regular filters. For best performance, use AMSOIL Ea Full-Flow Oil Filters and replace at the time of oil change. Other oil filters should be changed at standard OEM* intervals.
*OEM – Original Equipment Manufacturer
OIL ANALYZERS INC., 715-395-0222, is a division of AMSOIL that provides cost-effective, quality oil analysis services. For more information on product applications and service life, refer to the AMSOIL Product Recommendation and Drain Interval Guide (G1490).
AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information, visit www.amsoil.com/warranty.aspx.
HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS). An MSDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.
* All trademarked 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. All products advertised here are developed by AMSOIL for use in the applications shown.
|TYPICAL TECHNICAL PROPERTIES
Amsoil Premium Protection 20W-50 Synthetic Motor Oil (ARO)
|Kinematic Viscosity @ 100°C, cSt (ASTM D445)||19.5|
|Kinematic Viscosity @ 40°C, cSt (ASTM D445)||160.3|
|Viscosity Index (ASTM D2270)||139|
|CCS Viscosity @ -20°C, cP (ASTM D5293)||4636(-15)|
|Flash Point °C (°F) (ASTM D92)||230(446)|
|Fire Point °C (°F) (ASTM D92)||248(478)|
|Pour Point °C (°F) (ASTM D97)||-35(-31)|
|NOACK Volatility, % weight loss (g/100g) (ASTM D5800)||4.8|
|Four-Ball Wear Test (ASTM D4172) Scar, mm||0.48|
|Total Base Number (ASTM D2896)||12.1|
|High-Temperature/High-Shear Viscosity, cP (ASTM D5481)||5.5|
|Buy Now/Pricing Information ❯|