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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.

Close Product Detail
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
Close Technical Data

 20W-50 Premium Protection Motor Oil (ARO)

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Product Name: 20W-50 Synthetic Premium Protection Motor Oil (ARO)
Current Rating: 5 out of 5 stars
Votes & Reviews: 12 vote(s) and 11 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 mac: space

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.

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 Small engine Dr.: space

I will reorder this oil again.

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

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 racer270: space

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

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.

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 HD: space

Been using it for years

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

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 None: space

Yes

Excellent product.

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 Brent: space

This product has helped keep my hydro pump working great

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

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 Bob: space

I've used amsoil for over ten years and had no problems

It's a great product, I even get,an extra 2 miles per gallon which helps a lot

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 Mike: space

Wouldn't stop buying

Best oil out there, checked dip stick after 2000 miles looks like I just changed the oil

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 PAUL: space

Great oil for older big block engines

Use this oil in my big block mercury marine 454 inboard engines. Makes them run smooth and quiet. there is never any problem starting these engines, even after being stored for the long Canadian winter. The oil also help performance with at least a 20 hp power increase!

Item Reviewed: 20W-50 Synthetic Premium Protection Motor Oil (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 David: space

Great oil

Since I started using this oil in 2006 I'm satisfied with its performance. I use it in a 3406E caterpillar engine. The engine runs cooler and more fuel efficient. Very happy with the ARO 20W/50.

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