AMSOIL Premium Protection 20W-50 Synthetic Motor Oil
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Premium Protection 20W-50 Synthetic Motor OilHelp

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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/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.

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 19 reviews)

Ratings Distribution

  • 5 Stars

     

    (19)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 19 customers

Displaying reviews 1-10

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5.0

Excellent

By 

from Montana

Verified Buyer

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

I am a firm believer in Amsoil. This oil helped me out with my 75 chevy 350. It took away an engine tick. It also runs and idles a lot smoother. Excellent product.

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • 1975 Chevy K20

(0 of 1 customers found this review helpful)

 
5.0

Premium Protection 20W-50 Synthetic Motor Oil , high zinc

By 

from santa ysabel ca.

Verified Buyer

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

i love the product , i drive less then 12,000 miles
and so i have been changing my oil once a year ,

since 2007 when i overhauled my dodge diesel engine.
in fact it's cheaper then running Dino oil ,.. and changing it every 3,000 ~ 4,000 miles.

thank you for the grate product.

GA.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 1999 dodge Ram 2500, diesel 4x4 pick up
 
5.0

I love the high zinc oil!

By 

from Denver co

Verified Buyer

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

I've been using this oil in my drift cars for years now, and have gotten to tear a couple motors down for rebuilds ( due to low compression) and got the opportunity to see that the oil has Done it's job! It kept the engin clean inside, and protected the bearing like it was supose to!

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 91 Toyota cressida 1jz vvti

(1 of 1 customers found this review helpful)

 
5.0

Been using it for years

By 

from Brandon, ms

Verified Buyer

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

Works great lasts a long time. Use it in my small engines. Lawn mowers , pressure washers, etc.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • All kinds
 
5.0

2013 Toyota RAV4

By 

from Newport Beach, Ca

Verified Buyer

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

My application is a 2013 Toyota RAV4 with 15k miles. I use 10w-40 Amsoil and change just once a year since I normally drive about 3800 miles a year anyway using Amsoil Full Synthetic..

I feel more confident using this and changing it myself the first several years as opposed to letting Toyota change it for FREE with regular oil every 6 months. Basically I can do it myself once a year and still save time from waiting around at a stealership lobby and have confidence I will not sludge up ever with better protection. Not to mention I know I do it right and tighten everything back up.

I personally had some bad experiances in the past and do not trust them working on my car since I bought it new. One time the spark plugs were apparently never tightened as an example on another new car we purchased during a service.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 2013 Toyota RAV4

(0 of 2 customers found this review helpful)

 
5.0

Yes

By 

from None

Verified Buyer

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

Excellent product.

  • How would you describe yourself?:
  • I'm a full-on gearhead
 
5.0

Hard to beat

By 

from The Old North State

Verified Buyer

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

I've been using this for as long as I can remember in my Land Rover

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Land Rover 3.9/4.2/4.0/4.6

(0 of 1 customers found this review helpful)

 
5.0

Jgtxmaint

By 

from San Antonio

Verified Buyer

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

Great product and fast shipping at reasonable price

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Classic Muscle and Ford SuperDuty

(1 of 1 customers found this review helpful)

 
5.0

This product has helped keep my hydro pump working great

By 

from Bowling green, Ohio

Verified Buyer

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

I have a z turn mower with over 3000 hrs on one of the pump I have used this product to extend the life way past normal factory suggested hrs

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • 5 ton trucks , pickups , cars, mowers
 
5.0

Good stuff !

By 

from undisclosed

Verified Buyer

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

All I have ever used in my motorcycles. Runs noticeably cooler and longer between changes. Couldn't use in the old 1942 Harley though. Leaked out too fast.

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