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Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)

 Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
Product Code: DEO • Brand: AMSOIL

Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Signature Series Max-Duty Synthetic Diesel Oil delivers 6X better wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222. Advanced synthetic technology provides excellent viscosity control and outstanding extreme-temperature performance, while minimizing oil consumption. The result: protection that's boosted to the max.

Package sizes include:

Quart Bottles
Gallon Bottles
2.5-Gallon Bottles
30-Gallon Drum
55-Gallon Drum
275-Gallon Tote

See Pricing or Place an Order
MSDS Data Sheet

Product Details

Product Applications

Use in diesel engines and, where appropriate, gasoline engines requiring any of the following specifications:

Product Application Specs

• API CK-4/SN, CJ-4, CI-4+, CF
• Volvo VDS4.5, VDS4, VDS3
• Mack EOS-4.5, EO-O
• Renault RLD-4, RLD-3
• Cummins CES20086, CES20081
• Caterpillar ECF-2, ECF-3, ECF-1-a
• DDC 93K218, 93K215, 93K214
• DFS 93K222
• ACEA E9, E7
• MB 228.31
• MAN 3575
• MTU Type 2.1, II, I
• JASO DH-2
• Allison TES439
• Deutz DQC III-10LA
• Scania LA-2
• Chrysler MS 10902
• Ford WSS-M2C171-F1

Product Description

Maximum Engine Protection: Wear on rings and cylinder liners leads to increased oil consumption and loss of compression, resulting in reduced horsepower and fuel economy. Independent testing shows AMSOIL Signature Series Max-Duty delivers 6X more wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222, delivering the security of providing your diesel the extra protection it deserves.

Viscosity Control

Using top-tier synthetic base oils, AMSOIL Signature Series Max-Duty is naturally resistant to oxidation and the thickening effects of soot contamination. That, along with boosted detergent/dispersant additives, keeps soot particles suspended independently, helping prevent the formation of larger, wear-causing particles. Viscosity increase is minimized and soot-related wear is controlled. Lower volatility also helps Signature Series Max-Duty retain its viscosity after high-temperature service for maximum engine protection and efficiency.

Excels in Extreme Temperatures

AMSOIL Signature Series Max-Duty Synthetic Diesel Oil resists thermal (heat) breakdown better than conventional and competing synthetic diesel oils. Unlike conventional oils, Signature Series contains no wax, staying fluid in sub-zero temperatures for easier starting, improved oil flow and reduced wear. Signature Series 0W-40 (DZF) has a broad viscosity range that offers 4X better cold-cranking ability than a 15W-40, making it excellent for use in both hot-operating engines and cold-weather starting extremes.

diesel oil Scuffing Test

Minimizes Oil Consumption

AMSOIL Signature Series Max-Duty has a low rate of volatility (burn-off), reducing oil consumption during operation and passing less oil vapor into the combustion chamber. It provides up to 76 percent less oil consumption than required by the API CK-4 standard in the Caterpillar-1N oil consumption test.

diesel Oil Consumption

COMPATIBILITY

AMSOIL Signature Series Max-Duty Synthetic Diesel Oil is compatible with other conventional and synthetic engine oils. Mixing AMSOIL diesel oils with other oils, however, will shorten the oil's 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 diesel oils.

diesel oil OfficialOil icon

SERVICE LIFE

Diesel Engine Service Life

Heavy-Duty On-/Off-Road: Three times (3X) OEM1 recommendation, not to exceed 60,000 miles/600 hours or one year, whichever comes first.

Turbodiesel Pickup: Two times (2X) OEM1 recommendation, not to exceed 25,000 miles or one year, whichever comes first.

Gasoline Engine Service Life

Two times (2X) OEM1 recommendation, not to exceed 15,000 miles or one year, whichever comes first.

Drain intervals may be extended further with oil analysis.

Refer to your owner's manual for OEM drain interval recommendations and guidelines for severe and normal service.

Note: Extended drain intervals are not recommended for performance-modified engines, when using biofuels containing more than 10 percent ethanol or 15 percent biodiesel (B15) or for 2007-2009 Caterpillar* C13 and C15 on-highway engines. Extend drain intervals beyond OEM recommendations in these instances only with oil analysis. Note: 2007-2010 Dodge**, Ford** and GM** turbodiesel pickups are also not recommended for extended drain intervals when using DHD.

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 DEO.

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

Close Product Detail
Technical Data
TYPICAL TECHNICAL PROPERTIES
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil (DEO)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)15.4
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)94.5
Viscosity Index (ASTM D-2270)173
CCS Viscosity @ -30°C, cP (ASTM D-5293)5555
Pour Point °C (°F) (ASTM D-97)-43 (-45)
NOACK Volatility, % weight loss (g/100g) (ASTM D5800)9.2
Total Base Number (ASTM D2896)10.1
High-Temperature/High-Shear Viscosity, cP (ASTM D5481)4.3
Sulfated Ash Content, wt. % 0.99
Close Technical Data

 Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)

Did this product meet your expectations?

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Product Name: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
Current Rating: 4.9 out of 5 stars
Votes & Reviews: 43 vote(s) and 44 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 Big Frank: space

Great oil unbeatable

New 2017 ford diesel. Outstanding oil. Highly recommend it. Would only use this oil in my new Diesel engine It is so high tech

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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

Great product

Ran for 8 thousand miles & love it so far

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 Dimonic: space

Correct oil and filter, ready and waiting for pickup.

I like to do my own oil changes, and avoid all the "additional" services the dealer offers.

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 Cumminswitit: space

Love this stuff

My truck and I love this stuff. I run it for a year between changes and love it. Best oil out there

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 elkoholic: space

Will use this oil from now on.

Truck is used for hauling horses.

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 Petro: space

Trusting Ams Oil to take care of my truck

I use Ams oil in every application of my truck and never have I been let down

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 MURF: space

YES

IN A DODGE SPRINTER

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 4B RANCH: space

amsoil synthetic with EAO filters

I have three diesel trucks and five diesel tractors, and all are serviced with Amsoil products. Besides extended oil changes, my engines stay clean and trouble free. I would never consider using anything else.

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 Randy: space

I would buy again and have continued to buy this oil.

I have used this oil for over 18 years in a 7.3 diesel ford-350 4x4 and have had great performance in using it .The engine doesn't have to work as hard with Amsoil synthetic oil 5-40w it runs cooler and less RPMs for the same speed as other oils . If you're not using Amsoil synthetic oils in your engine and truck and or other motor vechicle your missing out on the best performance your motor Vechicles can give you ..

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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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 engr: space

l6x diesel oil

looks good. I will need more time to fully evaluate it.

Item Reviewed: Signature Series Max-Duty Synthetic CK-4 Diesel Oil 5W-40 (DEO)
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