NEW AMSOIL Preferred Customer Program

Premium 5W-40 Synthetic Diesel OilHelp

Maximum Fuel Economy and Extended Drain Intervals in Ultra-Low Emission Diesel Engines

Premium 5W-40 Synthetic Diesel Oil Product Image
Click image to enlarge
$11.30 Retail Price (USD)
Package Size:
Unit of Measure:
QTY:
Product Code: DEOQT-EA
Product Highlights View Full Description

The premium choice diesel oil for model-year 2007 and newer heavy-duty and pickup truck diesel engines requiring API CJ-4 emission-quality oil standards. Delivers extraordinary lubrication in diesel engines in commercial, fleet and personal applications. Exceeds modern specs for emission-quality diesel oil.

Field Studies & Performance Data

AMSOIL Premium API CJ-4 5W-40 Synthetic Diesel Oil (DEO) Fuel Economy (697k PDF)

Download

Diesel Fleet Fuel Economy Study (G2904)

Download

Diesel Fleet Fuel Economy Study in Stop-and-Go City Conditions (G3086) (368k PDF)

Download

PRODUCT DESCRIPTION
AMSOIL Premium 5W-40 Synthetic Diesel Oil is the premium choice for API CJ-4 emission-quality diesel oil required by model-year 2007 and newer diesel engines. It delivers extraordinary lubrication in diesel engines found in commercial, fleet and personal vehicles. Built with the best additive and synthetic base oil technology, AMSOIL Premium 5W-40 Synthetic Diesel Oil exceeds the higher performance demands of modern engines. It withstands the stress of heat, soot and acids to help prevent deposits, wear and corrosion. AMSOIL Premium 5W-40 is wax-free with a broad viscosity range to provide exceptional cold-weather starting and high-temperature protection. It resists breakdown and offers maximum fuel efficiency over extended drain intervals.

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.

DEO Meets Emission System Requirements
AMSOIL Premium 5W-40 Synthetic Diesel Oil is a low-sulfated ash formulation that exceeds the requirements for low-emission quality diesel oil. It is compatible with all exhaust treatment devices and is designed to extend the service life of diesel particulate filters (DPF).

Extended Drain Performance
AMSOIL Premium 5W-40 Diesel Oil can extend drain intervals far beyond those recommended for conventional petroleum oils. Its unique synthetic formulation and longdrain additive system (10.4 TBN) deliver superior engine protection, cleanliness and performance over extended drain intervals. AMSOIL 5W-40 Synthetic Diesel Oil provides maximum protection for up to 3X the original equipment manufacturer (OEM)-recommended drain interval and even further with oil analysis.

Improves Fuel Economy
The advanced synthetic technology used to engineer AMSOIL Premium 5W-40 Diesel Oil enhances viscosity properties and is proven to deliver better fuel economy. In fact, the Environmental Protection Agency’s (EPA) Federal Test Procedure confirms that AMSOIL 5W-40 Diesel Oil provides up to 3 percent increased fuel economy over conventional 15W-40 diesel oils. When driving at a mix of 55 percent city/45 percent highway, the average improvement is 1.6 percent and at straight highway driving the average improvement is 1.25 percent.

Minimizes Oil Consumption and Emissions
Due to its low rate of volatility, AMSOIL 5W-40 Synthetic Diesel Oil is able to reduce oil consumption and emissions during operation. Lower volatility helps AMSOIL Premium Diesel Oil retain its viscosity after high-temperature service for dependable protection and excellent fuel economy

Controls Soot-Thickening and Wear
The advanced synthetic base oils in AMSOIL 5W-40 Diesel Oil are naturally resistant to soot contamination. That, along with a heavy fortification of 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.

APPLICATIONS
AMSOIL Premium 5W-40 Synthetic Diesel Oil is recommended for diesel engines and, where appropriate, gasoline engines requiring any of the following specifications:

  • SAE 5W-40
  • API Licensed CJ-4, CI-4+, CF, SN, SM
  • ACEA E7, E9
  • Mack EO-O
  • DDC 93K218
  • Caterpillar ECF-3, ECF-2, ECF-1-a
  • Cummins 20081
  • Volvo VDS-4, VDS-3
  • MS 10902
  • MB 228.31
  • MTU Type I & II, Type 2.1
  • MAN 3275, 3575
  • JASO DH-2
  • Global DHD-1
  • Renault RLD-3
  • Ford WSS-M2C171E

COMPATIBILITY
AMSOIL Premium 5W-40 Synthetic Diesel 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 motor oils.

SERVICE LIFE
AMSOIL Premium 5W-40 Synthetic Diesel Oil is recommended for extended drain intervals in unmodified, mechanically-sound vehicles or equipment as follows:

Diesel Engine Service

  • Three times (3X) OEM* recommendation, not to exceed 50,000 miles/600 hours or one year, whichever comes first. Drain intervals may be extended further with oil analysis.
  • 2007-2009 Caterpillar C13 and C15 on-highway engines must follow OEM drain interval.
  • 2007-Present Dodge, Ford and GM LMM light-duty diesel pickups must follow OEM-recommended drain interval. Drain intervals may be extended with oil analysis.

Gasoline Engine Service

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

*Operating conditions and drain intervals for normal and severe service are defined by the OEM. Refer to your owner’s manual.

Note: Extended drain intervals are not recommended when using biofuels containing >10% ethanol or 5% biodiesel (B5). Follow OEM drain intervals or extend drain intervals with oil analysis.

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.

For warranty information, visit www.amsoil.com/warranty.aspx.

DEO Package Sizes
Code Package Size Unit of Measure Product
DEOQT (DEOQT-EA) Quart Each Premium 5W-40 Synthetic Diesel Oil
DEOQT (DEOQT-CA) Quart Case of 12 Premium 5W-40 Synthetic Diesel Oil
DEO1G (DEO1G-EA) Gallon Each Premium 5W-40 Synthetic Diesel Oil
DEO1G (DEO1G-CA) Gallon Case of 4 Premium 5W-40 Synthetic Diesel Oil
DEOTP (DEOTP-EA) 2.5-Gallon Each Premium 5W-40 Synthetic Diesel Oil
DEOTP (DEOTP-CA) 2.5-Gallon Case of 2 Premium 5W-40 Synthetic Diesel Oil
DEO30 (DEO30-EA) 30-Gallon Drum Each Premium 5W-40 Synthetic Diesel Oil
DEO55 (DEO55-EA) 55-Gallon Drum Each Premium 5W-40 Synthetic Diesel Oil
DEO27 (DEO27-EA) 275-Gallon Tote Each Premium 5W-40 Synthetic Diesel Oil
More about AMSOIL Reviews

REVIEW SNAPSHOT®

by PowerReviews
AMSOILPremium 15W-40 Synthetic Diesel Oil
 
4.8

(based on 34 reviews)

Ratings Distribution

  • 5 Stars

     

    (28)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

97%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Happy Camper!

I have been using Amsoil in my diesel towing vehicles sense 2004, when I purchased my first diesel GMC 2500 pickup. I tow a 10,000 pound Airstream Travel Trailer 10,000 to 15,000 miles a...Read complete review

I have been using Amsoil in my diesel towing vehicles sense 2004, when I purchased my first diesel GMC 2500 pickup. I tow a 10,000 pound Airstream Travel Trailer 10,000 to 15,000 miles a year, and change my oil one time each year. I have used an Amsoil Duai Filter System with the Bypass filter. I change the Full Flow Filter two times per year, and the Bypass filter one time. I got my oil analyzed each year just before my oil change for six years. I never had the lab recommend I change the oil. I put 125,000 miles om my first Amsoil truck, then sold it to a friend in 2014. The oil I am reviewing was bought for that friend, that is stil towing a Travel Trailer and changing the oil like I did.
I now have a 2015 Chevy 3500 Diesel set up just like my 2004 GMC was for Amsoil and dual filters. The order for this oil also included the oil and filters for my new truck. I look forward to getting the same results with this truck doing the same job.

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 34 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
4.0

Winter start

By 

from Hanmer ontario

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Truck not plugged in -40c slow crank still started. I believe 5-40 made the difference. Good oil

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • 2005 dodge 2500 5.9 cummins
 
5.0

great

By 

from Heber, Az

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Been using this oil for a while and like it. Cold weather starts a breeze!!!!!!

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • 2009 Chevy 2500HD ext cab 4x4 Duramax
 
5.0

outstanding diesel oil.

By 

from southern cal.

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

could not think of a better oil. longevity, performance, and mileage difference is evident. recommend it for all diesel vehicles. No complaints.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 93 dodge cummings diesel, 2011 ford die.

(1 of 1 customers found this review helpful)

 
4.0

Great product would recommend.

By 

from Camden, OH

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

I use amsoil in my 07 diesel truck, I have 7,000 miles on the oil change and still clean according to the lab test! I've used amsoil in different motors and I'm a believer, this oil is spectacular from my personal experience.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 07 6.0 f350/ih farm equip.
 
5.0

My Ford F250 diesel loves it.

By 

from White Salmon, Washington

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Have been using this product in my 2011 ford diesel since day one. I put on about 14,000 miles a year and change my oil once a year. I have never had to add oil between oil changes. I'm amazed even at change time the oil is still so clear its hard to read the dip stick. Ive been trying to figure out something to put on the dip stick to see the oil easier.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • F250 Diesel, Diesel VW, Gator, & more
 
5.0

Easy starting in Canada's North

By 

from Yellowknife, NT, Cnada

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

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.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 2009 Dodge RAM 3500
 
5.0

The Best!!

By 

from Colorado

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Amsoil Premium 5W-40 Synthetic Diesel Oil is the best! I have used it on my diesel vehicles for years, and have been quite satisfied with its longevity and performance.

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

Excellent oil

By 

from South Ga.

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

2011 F250 6.7L. Great oil with great customer service to back it.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • F250, Toyota Sequoia, gravely mower
 
5.0

Will be buying this for years to come

By 

from Greenville MS

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Excellent performance in my 6.7 power stroke

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • 2015 Ford F250s
 
5.0

25000 mile oil and filter

By 

from Kansas City Mo

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

I've been using AMS 15w-40 and the 25000mile filter for over 170,000 miles and have been completely satisfied.The fact that I don't have to take the time to get an oil change every 3000 to 5000 miles helps a guy like me who's on call 24/7.

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • Chevy Exp. 3500 Duramax 6.6 liter diesel

Displaying reviews 1-10

Back to top

Previous | Next »