Mobil Delvac™ Extreme 15W-40

Name: Mobil Delvac™ Extreme 15W-40
Brand: Mobil
SKU: 20152010D550

Synthetic diesel engine oil

Mobil Delvac™ Extreme 15W-40 diesel engine oil with CK-4 identifier

Mobil Delvac™ Extreme 15W-40 is a synthetic, high-performance diesel engine oil that helps extend engine life while providing long drain capability for modern diesel engines operating in extreme conditions. It is recommended for use in a wide range of heavy-duty applications and operating environments found on- and off-highway, including engines operating under heavy loads.

Fully backward compatible, Mobil Delvac Extreme 15W-40 engine oil delivers exceptional performance in both newer and older heavy-duty engines. Its boosted formulation provides:

• Exceptional oxidation stability*
• Extended oil drain interval (ODI) potential up to 2X the average OEM ODI recommendation†
• 46 percent more antioxidant and 44 percent more anti-wear additive than Mobil Delvac™ 1300 Super
• Excellent soot and viscosity control

Mobil Delvac Extreme 15W-40 engine oil delivers updated high-temperature performance under the extreme operating environments found in the trucking, mining, construction and agricultural industries. Accordingly, this oil meets or exceeds the requirements of API CK-4, CJ-4, CI-4 PLUS, CI-4 and CH-4 service categories, as well as key original equipment manufacturer (OEM) requirements.

Mobil Delvac Extreme 15W-40 diesel engine oil is recommended by ExxonMobil for use in:
• Modern, high-performance diesel engines with exhaust gas recirculation (EGR), after treatment systems with diesel particulate filters (DPFs) and diesel oxidation catalysts (DOCs)
• Naturally aspirated and turbocharged, diesel-powered engines
• On-highway light- and heavy-duty trucking, including mixed fleets
• Off-highway industries, including mining, construction, quarrying and agriculture

*Based an analysis of Volvo T-13 engine test results.

†Based on US engine manufacturers’ (OEM) average oil drain intervals (ODI) API CK-4 / API FA-4 recommendation. Results vary based on vehicle/engine condition, driving and environmental conditions. Consult OEM or ExxonMobil before implementing extended ODIs, especially if the equipment/vehicle is under warranty.

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Product Data Sheets (PDS)
Safety Data Sheets (SDS)

Features and Benefits

Mobil Delvac Extreme is formulated with synthetic basestocks and a boosted additive system tailored to deliver extended performance for up to 2X beyond OEM recommended oil drain intervals¹. The proprietary formulation delivers excellent wear protection, exceptional oxidation stability², and outstanding TBN retention. Mobil Delvac Extreme also provides outstanding resistance to oil consumption, oxidation, corrosive and abrasive wear, and high temperature deposits.

Mobil Delvac Extreme 10W-30 has the potential to improve fuel economy³.

Features	Advantages and Potential Benefits
Exceptional oxidation stability²	Superior performance in extreme conditions and extended ODI service
Excellent soot and viscosity control	Greater engine efficiency, long engine life and long oil life
Excellent oil consumption control	Lower oil costs due to less make-up oil during operation
Outstanding TBN reserves	Corrosion protection and extended drain intervals for both new and old engines using up to 500 ppm sulfur diesel fuel
Low temperature fluidity and pumpability	Formulated for smooth starting in cold weather
Resistance to corrosive and abrasive wear	Long life of critical wear surfaces
Component compatibility	Long gasket and seal life
Meets demanding specifications of key diesel OEMs	One engine oil for mixed diesel fleets
Low ash formulation meeting API CK-4 and CJ-4 requirements	Long emissions aftertreatment life (DPF, DOC and SCR)

Applications

•Recommended for the latest heavy duty diesel engines operating in extreme conditions, including those equipped with aftertreatment systems and EGR.

• Recommended for diesel applications using older and naturally aspirated conventional designs.

• On-highway heavy-duty trucking and off-highway applications including trucking, mining, construction, agriculture and marine.

• On-highway applications operating in both high speed/high load and short haul pick-up/delivery service.

• Off-highway applications operating in severe low speed/heavy load conditions using up to 500 ppm sulfur fuels.

• Diesel-powered equipment from American, European and Japanese OEMs.

1) Results may vary based on vehicle/engine condition, driving and environmental conditions. Consult OEM or ExxonMobil before implementing extended ODIs.

2) Based on performance in the Volvo T-13 engine test.

3) Compared to an SAE 15W-40 conventional engine oil. Savings are dependent on vehicle engine type, outside temperature, driving conditions, and your current engine oil viscosity.

Specifications and Approvals

This product has the following approvals:	MOBIL DELVAC EXTREME 10W-30	MOBIL DELVAC EXTREME 15W-40
ALLISON TES 439		X
Cummins CES 20081	X	X
Cummins CES 20086	X	X
DTFR 15C100	X	X
Detroit Fluids Specification 93K218	X	X
Detroit Detroit Fluids Specification 93K222	X	X
DQC II-18 LA	X
DQC III-18 LA		X
Ford WSS-M2C171-F1	X	X
Mack EO-N Premium Plus 03		X
Mack EO-O Premium Plus	X	X
MACK EOS-4.5	X	X
MAN M 3775	X	X
MTU Oil Category 2.1		X
RENAULT TRUCKS RLD-3	X	X
VOLVO VDS-3	X	X
VOLVO VDS-4	X	X
VOLVO VDS-4.5	X	X

This product is recommended for use in applications requiring:
API CF	X	X
API CG-4	X	X
MAN M 3575	X	X

This product meets or exceeds the requirements of:
API CH-4	X	X
API CI-4	X	X
API CI-4 PLUS	X	X
API CJ-4	X	X
API CK-4	X	X
API SL		X
API SM		X
JASO DH-2	X	X
ACEA E11	X	X
ACEA E7	X	X
Caterpillar ECF-2		X
Caterpillar ECF-3	X	X

Properties and Specifications

Property	MOBIL DELVAC EXTREME 10W-30	MOBIL DELVAC EXTREME 15W-40
Grade	SAE 10W-30	SAE 15W-40
Ash, Sulfated, mass%, ASTM D874	1	1
Cold-Cranking Simulator, Apparent Viscosity @ -20 C, mPa.s, ASTM D5293		6100
Cold-Cranking Simulator, Apparent Viscosity @ -25 C, mPa.s, ASTM D5293	6600
Density @ 15 C, g/ml, ASTM D1298	0.868	0.873
Flash Point, Cleveland Open Cup, °C, ASTM D92	219	221
Hi-Temp Hi-Shear Viscosity @ 150 C 1x10(6) sec(-1), mPa.s, ASTM D4683	3.6	4.1
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445	11.8	14.3
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445	81.1	107.4
Mini-Rotary Viscometer, Apparent Viscosity, -30 C, mPa.s, ASTM D4684	18400
Mini-Rotary Viscometer, Yield Stress, -25 C, Pa, ASTM D4684		< 35
Pour Point, °C, ASTM D97	-42	-33
Total Base Number, mgKOH/g, ASTM D2896	9.6	10.3
Viscosity Index, ASTM D2270	140	133

Health and Safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx

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Rated 5 out of 5 by Anonymous from oil and rebate have not change oil yet but tried to do rebate TWICE and was denied both time according to person i talked to when i call the number on the first denial they could not see the delivery address.. So i make sure to screenshot, again, info from walmart online receipt to show.. again denied.. rebate SUCKS..

Date published: 2025-12-08

Rated 5 out of 5 by Keith H. from My reason. Decided to go with Mobil Delvac Extreme in my 2020 Duramax 6.6 HD from the first oil change, you pay $80,000 plus for a truck, why not take care of it?

Date published: 2025-11-02

Rated 5 out of 5 by Anonymous from Oil choice I buy your oil because of your Doug Kalitta sponsorship!!!

Date published: 2025-10-10

Rated 5 out of 5 by Lllu from Great Its great it’s great its great it’s great it’s great

Date published: 2025-06-02

Rated 5 out of 5 by Lonehunter from Trusted brand. Great oil. Been using for years. Holds up well whether running empty or pulling.

Date published: 2025-05-22

Rated 5 out of 5 by litink69 from Great products. Great oil have used for years. No issues. Motor runs great! I put this in all my automobiles.

Date published: 2025-05-10

Rated 5 out of 5 by Tim Tim from Works It worked perfectly and it was priced very affordably, which I really appreciate appreciated. I will be using this brand from now on.

Date published: 2025-04-28

Rated 5 out of 5 by Ingrid from Works Great!! This works fantastic for my car and it was a great price

Date published: 2025-04-16

Mobil Delvac™ Extreme 15W-40 Reviews - page 2

Mobil Delvac™ Extreme 15W-40

Synthetic diesel engine oil

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Features and Benefits

Applications

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Properties and Specifications

Health and Safety

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