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20W-50 Synthetic Premium Protection Motor Oil (ARO)

 20W-50 Premium Protection Motor Oil (ARO)
Product Code: ARO • Brand: AMSOIL

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.

Package sizes include:

Quart Bottle
Gallon Bottle
16-Gallon Keg
30-Gallon Drum
55-Gallon Drum

See Pricing or Place an Order
MSDS Data Sheet

Product Details

Product Applications

AMSOIL Synthetic 20W-50 Premium Protection Motor Oil is a multi-use, premium synthetic lubricant for applications that require or benefit from a higher viscosity oil. It is recommended for air and liquid cooled, large or small gasoline and diesel engines, transmissions and chaincase applications where 20W-50 oil is required with any of the following specifications:

Product Application Specs

• API SL, SJ, SH, SG
• API CI-4 Plus, 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
• VDS-2, VDS
• Mack EO-M+
• ACEA A3/B3, E3, E5
• MB 228.3, 229.1
• Detroit Diesel 93K214

Product Description

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 stocks and a superior additive package results in a formulation that exceeds the requirements of most gasoline or diesel applications that call for 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 for convenience and trouble-free operation.

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.

Superior Wear Protection

AMSOIL Premium Protection Synthetic Motor Oil is high-viscosity oil engineered to protect against metal-to-metal contact. It resists viscosity 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. AMSOIL Premium Protection Synthetic Motor Oil helps extend equipment life.

Wet Clutch Compatible

AMSOIL 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

AMSOIL Premium Protection Synthetic Motor Oil is specifically 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 nature 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 AMSOIL synthetic base stock and additive technology exceeds the requirements of both gasoline and diesel engines. AMSOIL Premium Protection Motor Oil is designed to neutralize acids, disperse soot and last longer in service than conventional oils.

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

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).

Click here to view the MSDS Data Sheet for AMSOIL ARO.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

Technical Data

TYPICAL PHYSICAL PROPERTIES
AMSOIL High Performance Synthetic 20W-50 Motor Oil (ARO)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445) 18.9
Kinematic Viscosity @ 40°C, cSt (ASTM D-445) 123.8
Viscosity Index (ASTM D-2270) 172
CCS Viscosity @ -15°C, cP (ASTM D-5293) 3525 (-15)
Pour Point °C (°F) (ASTM D 97) -36 (-33)
Flash Point °C (°F) (ASTM D 92) 233 (451)
Fire Point °C (°F) (ASTM D-92) 249 (480)
High Temperature/High Shear @ 150°C and 1.0 X 106 s-1, cP (ASTM D 4683), cP 5.0
Four Ball Wear Test (ASTM D 4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour, Scar in mm) 0.40
Noack Volatility, % weight loss (g/100g) (DIN 51581) 6.5
Total Base Number 12.1

 20W-50 Premium Protection Motor Oil (ARO)

Did this product meet your expectations?

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Product Name: Premium Protection Motor Oils (AMO,ARO)
Current Rating: 5 out of 5 stars
Votes & Reviews: 32 vote(s) and 37 user reviews.


A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Thor: space

High zinc oil that is durable

The Amsoil high zinc formula is all i use in my bbc. This oil holds up to the heat and high compression of my street/strip motor.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by George: space

Will buy again

I will continue to purchase nothing but AMSOIL for all our lubrication needs. Classic cars, snowmobiles, 4 wheelers, and our daily drivers. Gas and diesel. And dont forget the boats. It's one place for everything, shipped to my door.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Hilton: space

I would by this product again

Dad wanted an upgraded oil in his new F250 and I knew this company produces the best oil and I also run this in my Dixie chopper.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Thomas: space

I have been using this for the last 300000 miles.

Great oil for my diesel pickup.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Randall: space

The best dual use oil ever!

Great oil for street and track. Got my 996 oil analysis back after 6 months, multiple track days and of course...perfect results! Keep up the great work!

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by D: space

Nothing but Amsoil!

The absolute best of the best. I use it in everything. Every engine I use this oil in has never given me any kind of oil related problems. If you want your engines to last this is the oil to use.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Otis: space

No issues.

This oil is used in an extreme situation. Been a customer for years. No issues or failures

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Raycer: space

Works

I changed from the boosted version which lowered my my oil pressure way to much. Now my oil pressure never drops below 40 psi. With the boosted version it dropped to the 25 psi.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Johnny Racer: space

Great Product

I've been using this oil for 10 years in my 1995 BMW 325 which is a track/race car only. I put about 2000 miles a year on it and change the oil once a year. The engine is very happy runs like a top and I have 125,000 miles on it.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Keith: space

Best Synthetic Lubricants

I'm 65 years old and have been into automotive lubricants since I was a teenager. Out of all of the Automotive lubricants I have purchased and tested over the years. Nothing surpasses Amsoil products. Unlike most, I still change my engine oils at 3000 miles. That being said, I own a 1988 BMW M5 with almost 200K miles which still runs like it just rolled off the show room floor. There are many other brands and types of oils I consider to be excellent but nothing come close to Amsoil. It's the most trust high grade lubercants I have found to date and will NOT use any other brand.

Item Reviewed: Premium Protection Motor Oils (AMO,ARO)
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