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Signature Series Max-Duty Synthetic Diesel Oil 15W-40Help

Maximum-duty protection for your hardest-working diesel engines

Signature Series Max-Duty Synthetic Diesel Oil 15W-40 Product Image
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$11.10 Retail Price (USD)
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Product Code: DMEQT-EA
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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.

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.

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.

Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222
Oil Consumption

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

  • 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
  • Deutz DQC III-10LA
  • Scania LA-2
  • Chrysler MS 10902
  • Ford WSS-M2C171-F1

Official Oil

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.

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.

1Refer 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 Safety Data Sheet (SDS). USA and Canada (M)SDS are available upon request at 715-392-7101 or on the AMSOIL Website. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.

AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit www.amsoil.com/warranty.aspx.

* All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

DME Package Sizes
Code Package Size Unit of Measure Product
DMEQT (DMEQT-EA) Quart Each Premium 15W-40 Synthetic Diesel Oil
DMEQT (DMEQT-CA) Quart Case of 12 Premium 15W-40 Synthetic Diesel Oil
DME1G (DME1G-EA) Gallon Each Premium 15W-40 Synthetic Diesel Oil
DME1G (DME1G-CA) Gallon Case of 4 Premium 15W-40 Synthetic Diesel Oil
DMETP (DMETP-EA) 2.5-Gallon Each Premium 15W-40 Synthetic Diesel Oil
DMETP (DMETP-CA) 2.5-Gallon Case of 2 Premium 15W-40 Synthetic Diesel Oil
DME30 (DME30-EA) 30-Gallon Drum Each Premium 15W-40 Synthetic Diesel Oil
DME55 (DME55-EA) 55-Gallon Drum Each Premium 15W-40 Synthetic Diesel Oil
DME27 (DME27-EA) 275-Gallon Tote Each Premium 15W-40 Synthetic Diesel Oil
More about AMSOIL Reviews

REVIEW SNAPSHOT®

by PowerReviews
AMSOILPremium 15W-40 Synthetic Diesel Oil
 
4.9

(based on 72 reviews)

Ratings Distribution

  • 5 Stars

     

    (64)

  • 4 Stars

     

    (7)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

98%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Easy starting in Canada's North

I have been using AMSOIL Premium 5W-40 Synthetic Diesel Oil for the last five years and I have never had any issues starting when the temperature drops below -30C/-22F.
Read complete review

I have been using AMSOIL Premium 5W-40 Synthetic Diesel Oil for the last five years and I have never had any issues starting when the temperature drops below -30C/-22F.

I switched to AMSOIL after my first winter because I was not happy with the cold weather starting performance of other full-synthetic diesel oils.

VS

Most Liked Negative Review

 

Not worth the cost in my opinion

Can't say I had any issue in my 2014 Duramax but for the cost I will be buying something else. I just cant stand lettingmy truck go 10k++ miles on a single oil...Read complete review

Can't say I had any issue in my 2014 Duramax but for the cost I will be buying something else. I just cant stand lettingmy truck go 10k++ miles on a single oil change but that's just me.

Reviewed by 72 customers

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5.0

Dodge Ram 2500

By 

from Pomona, Ca.

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

great oil. last a long time with the proper bypass set up.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Dodge Ram 2500HD Cummins Diesel
 
4.0

l6x diesel oil

By 

from walla walla wa

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

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

  • How would you describe yourself?:
  • I love my vehicles / toys
 
5.0

Great premium diesel oil IMO

By 

from Chicago

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Premium oil for a premium price. Works out in the long run for me with extended drain intervals. I use it in all my diesel business trucks.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 2011 Duramax, 2015 Powerstroke, 2017 Dur
 
5.0

Awesome product

By 

from San Antonio TX

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

I use amsoil in all my vehicles, even my lawn mower. This stuff is the bomb, less oil pressure due to better flow, and smother running etc...

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 2016 Ram 2500 diesel

(1 of 1 customers found this review helpful)

 
5.0

Great oil for your engine

By 

from Las Vegas,NV

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Great oil for you engine can't go wrong with full synthetic. Other then manufacture recommendation on oil brand this is the only other brand I use. I'm still old school so 5k oil intervals is cheap insurance for a $67k truck. Oil itself is amazing compared to previous oil used at 5k miles drains Amsoil looks and feels great. Smoother engine idle and smoother engine operation at higher rpm range. I have a digital psi gauge installed and with Amsoil the engine oil psi has maintained same psi throughout the oil intervals the oil temperatures has dropped 8 degrees lower under same driving conditions. I know that's not a professional oil analysis but it's what I've got.

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • 2012 Forder F-250 6.7L
 
5.0

I will definitely buy this oil again

By 

from Ontario Canada

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

I use amsoil in everything I own, from vintage snowmobiles to outboard motors to stihl concrete saws to my cummins to my jeep crd. I swear by your products and have switched a number of people over to it. It's cheap insurance especially when you plan on keeping your investments for a long time. It's the only oil I can count on

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Diesel trucks, diesel jeep, cat forklift
 
5.0

Great product!

By 

from Crossett,AR

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

My 2016 F350 6.7L runs smoother on this oil

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Ford F350
 
5.0

diesel oil for my chevy duramax

By 

from euless,texas

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

Excellent fluid, haven't used anything else for years, thanks

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • chevy duramax and harley road king
 
5.0

Ansome

By 

from Cape coral fl

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

Amsoil is an ansome products.

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • Dump trucks skidsteers backhoe ect

(1 of 1 customers found this review helpful)

 
5.0

2016 Ram Eco Diesel

By 

from Crystal city Mo.

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

I notice a big difference in mileage and how the truck ran after changing the factory oil to Amsoil. The mileage is up over brand X that I replaced. I've used Amsoil in all my diesel trucks, no complaints!

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Truck

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