For use in both gasoline and diesel engines. Offers multi-functionality and wear protection. Ideal for applications where the extra protection of a higher-viscosity oil is desired. Excellent for
motor homes and older vehicles, as well as many types of modern equipment and compatible with some motorcycles.
Package sizes include:
Quart Bottle
Gallon Bottle
2.5-Gallon Bottle
30-Gallon Drum
55-Gallon Drum
AMSOIL Synthetic 10W-40 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 10W-40 oil is 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
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 10W-40 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
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.
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.
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.
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.
AMSOIL Synthetic 10W-40 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.
AMSOIL Synthetic 10W-40 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
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 AMO.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
| TYPICAL PHYSICAL PROPERTIES | |
| AMSOIL High Performance Synthetic 10W-40 Motor Oil (AMO) | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D445) | 14.5 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D445) | 91.7 |
| Viscosity Index (ASTM D2270) | 164 |
| CCS Viscosity @ -25°C, cP (ASTM D5293) | 5638 (-25) |
| Pour Point °C (°F) (ASTM D97) | -44 (-47) |
| Flash Point °C (°F) (ASTM D92) | 230 (446) |
| Fire Point °C (°F) (ASTM D92) | 250 (482) |
| High Temperature/High Shear @ 150°C and 1.0 X 106 s-1, cP (ASTM D4683), cP | 4.3 |
| Four Ball Wear Test (ASTM D4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour, Scar in mm) | 0.40 |
| Noack Volatility, % weight loss (g/100g) (DIN 51581) | 6.7 |
| Total Base Number | 12.1 |
Product Name: Premium Protection Motor Oils (AMO,ARO)
Current Rating: 4.93out of 5 stars
Votes & Reviews: 45 vote(s) and 53 user reviews.
Reviewed by Bradley: 
Porsche 911 air cooled
Reviewed by James:
Purchased for use in an inboard v 6 boat engine. Great oil for this application.
Reviewed by Cecil:
Great product
Reviewed by Richard:
Love this oil, the full synthetic oil I was using can not even hold a candle to AMSOIL. The engine runs so smooth and much more quietly : )
I also went from a 5w30 to the 10w40 for the summer, will change back to the 5w30 for the winter.
When I'm ready for a transmission fluid change I'm changing over to AMSOIL too.
Richard
Reviewed by Joey:
Bought this oil for our 2015 Scag Cheetah, so far it's amazing, it seems to run way better, and for some reason it doesn't pop anymore when starting it. It has a 31 hr Kawasaki motor . Our dealer told us to use 20 w50 in it, now I gotta cross reference the oil filter and order some.
Reviewed by Adam:
Product does wonders in the evo. The turbo requires high zinc so this does the job.
Reviewed by Shawn:
This Amsoil Motor Oil is used in a track car that constantly see's high RPM pulls on a road race course. Works well and oil temps seem to stay steady throughout a 20-30 minute session. Am pleased with the product and will continue to use it. It's what I would call "cheap insurance".
Reviewed by Thor:
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.
Reviewed by George:
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.
Canada
United States
Reviewed by Piotr:
Great old additive style oils
Running Toyota I6 motors with turbochargers on AMO 10W40. Motors are very clean inside, running smooth and quiet. It's quite expensive in Europe, but who bought something best in its category and cheap?