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Premium 5W-40 Synthetic Diesel OilHelp

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

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$11.30 Retail Price (USD)
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Product Code: DEOQT-EA
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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)

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Diesel Fleet Fuel Economy Study (G2904)

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

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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 5W-40 Synthetic Diesel Oil
 
4.8

(based on 50 reviews)

Ratings Distribution

  • 5 Stars

     

    (43)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

97%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

The best oil out there!

I use Amsoil in my 2015 F-250. This oil holds up under the stresses that come with running 11 hrs. a day 5 days a week in commercial use. My 2015 already...Read complete review

I use Amsoil in my 2015 F-250. This oil holds up under the stresses that come with running 11 hrs. a day 5 days a week in commercial use. My 2015 already has 155k miles on it thanks to Amsoil, without any engine problems. I have tried other oils, even Royal Purple Duralec, but none compare to the 15-40's strengths when under the high temperatures of Summer in the south and the cold temperatures of the north in Winter.

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 50 customers

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5.0

Yes

By 

from Chino calif

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

I noticed I get a better fuel gas mileage

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 14 freightliner Cascadia DD15

(1 of 1 customers found this review helpful)

 
5.0

Love it

By 

from Usa

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Cold start 2016 cummins. -23. No problem. Amazing in cold temps.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 6.7 cummins

(2 of 2 customers found this review helpful)

 
5.0

12 years and counting

By 

from undisclosed

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

I have been running this oil for over 12 years on my F350 7.3L Diesel. Still running strong.

 
5.0

Only the BEST for Me

By 

from undisclosed

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

I have been using Amsoil since 1979 and I believe in putting the Best Oil in all my Toys . I use it in my cars,garden tractor , lawn mower , whole house generator , power washer , and my 2 Corvettes ,and in my 2013 Kioti CK35 HST Diesel tractor . I guess you could call me an Amsoil Junkie

 
5.0

Loyal customer

By 

from undisclosed

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

I just changed the oil in my 2015 with Amsoil for the first time, because the truck came with 2 years of maintenance when bought new, and if you didn't use it your just wasting money.i am a firm believer in Diesel injector clean, I'm on my second Duramax and have never had a fuel related problem. I'll use Amsoil forever.
Thanks for great products.

 
5.0

I will continue to use Amsoil in all my vehicles.

By 

from undisclosed

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

Always quality. I run this in my 2009 Ram 6.7 Cummins. Been running nothing but Amsoil since I bought it in 2010 and no issues.
I also use Amsoil Signature 5w30 in my hotrods too. I have a 1967 Chevelle SS with Chevrolet crate 502 as well as a 2013 Camaro SS 1LE
I never worry about oil related issues with Amsoil.

 
5.0

5 years and counting

By 

from undisclosed

Verified Buyer

Comments about Premium 15W-40 Synthetic Diesel Oil:

I have used this product in my 05 Dodge 2500 for over 5 years and hasn't let me down. Great protection and good in the could mouths with could starting

 
4.0

Works good in cold weather.

By 

from undisclosed

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

08 Duramax 250k miles and still going strong. -30 here in winter, starts up with good oil pressure no waiting on the pressure gauge to pick up cold oil.

 
5.0

I change my own oil - have for 30 years. Always Amsoil.

By 

from undisclosed

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

When Amsoil produced a oil meeting Chrysler's requirements (2015 Jeep GC 3.0 Diesel) I jumped on it as I have always had good experience with Amsoil oil.

 
5.0

Best oil for my Cummins,

By 

from undisclosed

Verified Buyer

Comments about Premium 5W-40 Synthetic Diesel Oil:

Only product I use. The BEST!

I use it with AMSOIL FF and bypass filters.

Displaying reviews 1-10

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