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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.

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

Related Videos

6x More Wear Protection than Required!

Understanding the 2017 FA4 and CK4 Diesel Oil Specifications

Diesel Power Challenge


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

Did this product meet your expectations?

(click on a star to rate)

Product Name: Premium Diesel Oils (DEO,DME)
Current Rating: 4.88 out of 5 stars
Votes & Reviews: 200 vote(s) and 179 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 red: space

i would buy again probably soon also

great product

Item Reviewed: Premium Diesel Oils (DEO,DME)
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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 Dan: space

Use it in everything

I have nine diesels on the ranch and use Max-Duty in all of them including a few gasoline engines. Works like I expect it to work.

Item Reviewed: Premium Diesel Oils (DEO,DME)
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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 Rick: space

Great product

Use this in my 12v Cummins was adding about a half a quart of oil every 1000 miles before switching to to this oil now it's about a half a quart every 4000 miles and I change it every 5k.

Item Reviewed: Premium Diesel Oils (DEO,DME)
Discussion Url

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 Dirtman: space

The best oil there is

if you want the best protection for your engine buy amsoil. I use it in everything so my equipment will last.

Item Reviewed: Premium Diesel Oils (DEO,DME)
Discussion Url

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 Brian: space

Good product.

Use this in my Wrx and it runs well and looks better on the dipstick than the 5W30 SS. But only time will tell if it holds up

Item Reviewed: Premium Diesel Oils (DEO,DME)
Discussion Url

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 Friedrich: space

I use this for my oil only

Hands down the best oil out there i have tested my oil after it comes out and still have amazing tbn numbers in ty he 5 range with 7000 miles on that oil

Item Reviewed: Premium Diesel Oils (DEO,DME)
Discussion Url

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 Andy: space

Excellent Product

Switched my 2015 powerstroke over to this when it hit 20k miles. Now at 135k and zero problems. When it says "change oil soon" I go online and order it, 2-3 days later it is here. Wish there was a better price break on the gallon jugs rather than having to pour in 13 individual quarts as it is cheaper by the case.

Item Reviewed: Premium Diesel Oils (DEO,DME)
Discussion Url

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 John: space

Nothing else goes in my truck

When I ordered my duramax in 08 I wanted to run the best oil and fluids because I don't plan on buying another 65,000 truck. I researched extensively and found the decision easy. Everything but the radiator has amsol. I'm at 320,000 problem free miles. With the exception of the headlights that regularly burn out, I haven't had one single issue with my truck. I bought a 24' triton boat with a 300 yamaha and the day my warranty ran out it also got refilled with amsol marine oil. .

Item Reviewed: Premium Diesel Oils (DEO,DME)
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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 navret02: space

Best Oil Ever

Was introduced to this oil and it really works. Protecting my 6.0 Diesel Engine under any load, especially with the Bypass oil system!

Item Reviewed: Premium Diesel Oils (DEO,DME)
Discussion Url

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

Switching oil

The total Base number is way too low for my liking since they changed the formulation. I am switching brands of oil.

Item Reviewed: Premium Diesel Oils (DEO,DME)
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