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AMSOIL Premium Protection 20W-50 100% Synthetic Motor Oil

Product code : AROQT-EA

  • 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
Warning - Click here for Proposition 65 information for this product

AMSOIL Premium Protection 20W-50 100% Synthetic Motor Oil



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

Superior Wear Protection
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.

Wet-Clutch Compatible
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.

Resists Oxidation and High-Temperature Breakdown
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.

Extends Drain Intervals in Gasoline and Diesel 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.

APPLICATIONS
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 20W-50 oils are required with any of the following specifications:

  • API SL, SJ, SH, SG
  • API CI-4+, CI-4, CH-4, CF, CF-2
  • ISO-L-EMA
  • 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

MIXING AMSOIL
AMSOIL Synthetic 20W-50 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.

SERVICE LIFE
AMSOIL Synthetic 20W-50 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/about/guarantee/.

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.

AMSOIL Premium Protection 20W-50 100% Synthetic Motor Oil

Data Bulletin

Warranty

SDS



AMSOIL Premium Protection 20W-50 100% Synthetic Motor Oil

  • 5 star rating
    Best oil ever
    By  JAMES,  a  Verified Buyer  from  Louisiana  on  December 04, 2024
    I started using AMS OIL back in 1996. I began using this oil in my race bikes. No street bikes. These are fully built 16,000rpm race bikes. Daytona, Moroso, Homestead and N. Jennings. I never once lost an engine in a entire decade. Now I still use AMS OIL in my 600hp Turbo Honda Civic. I mean this kindly. Dont be cheap. Use the best
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil for my 2014 Chevrolet
    By  SERGE,  a  Verified Buyer  on  October 14, 2024
    My truck was burning oil with the recommended 0w-20 oil that gmc said to use. Now I’m using the 10w-40 from amsoil and my truck doesn’t burn oil anymore
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    AMSOIL Premium Protection 10W-40 100% Synthetic Motor Oil
    By  Eugene,  a  Verified Buyer  from  Brooklyn, NY  on  May 14, 2024
    Excellent quality oil. AMSOIL the best. Engine working smooth,quiet.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Top Quality Product!
    By  ANDREW H.,  a  Verified Buyer  on  May 11, 2024
    Allways quick delivery and as good as it gets for quality products!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Full Syn
    By  TOM,  a  Verified Buyer  from  Ontario Canada  on  May 08, 2024
    Use this oil in both of my old Hot Rods.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    So far, as advertised!
    By  COREY,  a  Verified Buyer  from  VA  on  March 29, 2024
    Was recommended amsoil for my Hayabusa's sticking clutch (after winter storage) & so far, so good. I haven't stored the bike yet w/oil but transitions seem smoother! Little pricey tho
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 3 star rating
    We shall see
    By  JOHN,  a  Verified Buyer  on  March 14, 2024
    Just put it in my Silverado. We’ll see how it performs.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    GatorTail XD 40
    By  ALEX,  a  Verified Buyer  from  MS  on  March 07, 2024
    Great engine oil, highly recommended and will buy again for my surface drive engine.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Jeep
    By  SMP,  a  Verified Buyer  from  Lowell Arkansas   on  February 26, 2024
    Great high zinc oil for my jeep. Runs quieter and better for my engine.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Great Oil
    By  Targa Eng,  a  Verified Buyer  from  Florida  on  February 13, 2024
    Been using this for many years in older air cooled flat tappet Porsche engines. Does well on the track and retains good test sample numbers for surprisingly long drain intervals.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?