AMSOIL Premium Protection 20W-50 Synthetic Motor Oil
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Premium Protection 20W-50 Synthetic Motor Oil Product Image
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$11.80 Retail Price (USD)
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Product Code: AROQT-EA
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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

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.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.

ARO Package Sizes
Code Package Size Unit of Measure Product
AROQT (AROQT-EA) Quart Each Premium Protection 20W-50 Synthetic Motor Oil
AROQT (AROQT-CA) Quart Case of 12 Premium Protection 20W-50 Synthetic Motor Oil
ARO1G (ARO1G-EA) Gallon Each Premium Protection 20W-50 Synthetic Motor Oil
ARO1G (ARO1G-CA) Gallon Case of 4 Premium Protection 20W-50 Synthetic Motor Oil
ARO16 (ARO16-EA) 16-Gallon Keg Each Premium Protection 20W-50 Synthetic Motor Oil
ARO30 (ARO30-EA) 30-Gallon Drum Each Premium Protection 20W-50 Synthetic Motor Oil
ARO55 (ARO55-EA) 55-Gallon Drum Each Premium Protection 20W-50 Synthetic Motor Oil
ARO27 (ARO27-EA) 275-Gallon Tote Each Premium Protection 20W-50 Synthetic Motor Oil
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by PowerReviews
AMSOILPremium Protection 10W-40 Synthetic Motor Oil
 
5.0

(based on 29 reviews)

Ratings Distribution

  • 5 Stars

     

    (28)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 29 customers

Displaying reviews 1-10

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5.0

Best there is

By 

from Texas Hill Country-Central Texas

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

I have been using Amsoil in my cars that I drag race for 12 years...never an issue....Amsoil is by far the Gold standard of motor oils .

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Two Mustangs an F150 and a Taurus
 
5.0

Fantastic oil.

By 

from Appleton WI

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

This oil has a very strong cleaning aspect. When I drained the oil the first time I used it in a motorcycle with 17000 miles on it, it came out looking like thick almost gloppy molasses. Very black and quite thick. Subsequent oil changes have resulted in the oil coming out much cleaner. So much so that I can see light through the stream of oil as it is draining from the engine. I recently removed a side cover to inspect the clutch plates. The inside of the engine is clean like it was new. I'm very happy with this product.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 1980 Yamaha XS850 motorcycle
 
5.0

Premium Protection 20W-50 Synthetic Motor Oil

By 

from Ft.Worth, Texas

Verified Buyer

Comments about Premium Protection 20W-50 Synthetic Motor Oil:

I am using this oil in my 95 GMC Sierra SLE. with a V8 5 litre. The oil makes the engine run smoother and quieter. Gas mileage seems better. The gas needle doesn't drop as quickly. I have been using it for 2 months. so far no leaks, no oil consumption. Acceleration is good.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 95 GMC Sierra SLE, V8 5.0 litre, 1/2 ton
 
4.0

this oil works great

By 

from hyde park,utah

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

I use this oil in my high mile Plymouth with 175k miles on the engine without any trouble with lots of highway miles. thanks

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 99 plymouth voyager

(0 of 1 customers found this review helpful)

 
5.0

I have ben buying it for the past 40 years

By 

from Jacksonville, NC

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

I run AMSOIL 10W/40 in both vehicles a 2006 Tundra Limited, a 2012 Dodge Caravan and my John Deer 300X Riding mower and in every vehicle I have owned over the past 40 years. When 50w AVOIL was available I ran it in my 1977 Cessna 172N.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Trucks, Vans, Mowers

(0 of 2 customers found this review helpful)

 
5.0

Good product

By 

from Waynesboro Pa

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

Put 7qt. in my 68 Charger and I am very happy with results.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 68 Dodge Charger

(1 of 1 customers found this review helpful)

 
5.0

Never running Mobile again

By 

from Phoenix az

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

Not the cheapest, just the best. After tearing down my motor after 250hr for rebuild/refresh, my rod, cam, and crank bearings still looked new. Keep in mind this isn't a pampered motor. It gets run hard, yet the rebuild seemed completely unnecessary.

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • Mopar big block

(0 of 1 customers found this review helpful)

 
5.0

Have been using it for years

By 

from Lewisville,NC

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

I have used it in my durango for years.It is a great synthetic oil

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • A Ram,Durango,Dakato.

(1 of 1 customers found this review helpful)

 
5.0

I will reorder this oil again.

By 

from Mo.

Verified Buyer

Comments about Premium Protection 20W-50 Synthetic Motor Oil:

Oil lasts longer in my older vehicle and I don't have to add any between oil changes.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Motor home, mower's, small dozer, Atv.

(1 of 1 customers found this review helpful)

 
5.0

I won't use any other oil

By 

from Gilbert Az

Verified Buyer

Comments about Premium Protection 10W-40 Synthetic Motor Oil:

I love the piece of mind knowing when I crank up my truck in the morning there's no dry starts

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 92 Chevy pickup 4x4 and 07 Kia

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