Top 10 Best Diesel Engine Oil 15w-40 Full Synthetic

of November 2024
1
Best ChoiceBest Choice
Ultra1Plus SAE 15W-40 Synthetic Blend Heavy-Duty Motor Oil API CK-4/SN - 1 Quart
ULTRA 1PLUS
ULTRA 1PLUS
10
Exceptional
View on Amazon
2
Best ValueBest Value
Ultra1Plus SAE 15W-40 Conventional Heavy-Duty Motor Oil, API CI-4/SL
ULTRA 1PLUS
ULTRA 1PLUS
9.9
Exceptional
View on Amazon
3
Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil (1-Gallon, Case of 3)
Shell Rotella
Shell Rotella
9.8
Exceptional
View on Amazon
4
Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA,
Valvoline
Valvoline
9.7
Exceptional
View on Amazon
5
Triax Fleet Supreme ESP 15W-40 API CK-4 Full Synthetic Diesel Engine Oil,
Triax
Triax
9.6
Exceptional
View on Amazon
6
Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon, Single Pack)
Pennzoil
Pennzoil
9.5
Excellent
View on Amazon
7
Triax Fleet Ultra ESP 15W-40 API CK-4 Licensed Synthetic Blend, Moly and Boron
Triax
Triax
9.4
Excellent
View on Amazon
8
Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40
Schaeffer Manufacturing Co.
Schaeffer Manufacturing Co.
9.3
Excellent
View on Amazon
9
Triax Fleet Supreme ESP 5W-40 API CK-4 Full Synthetic Diesel Engine Oil,
Triax
Triax
9.2
Excellent
View on Amazon
10
Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil, API CK-4/SN | 5
ULTRA 1PLUS
ULTRA 1PLUS
9.1
Excellent
View on Amazon
11
Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40, 5 Gallon Pail
Shell Rotella T
Shell Rotella T
9.0
Excellent
View on Amazon
12
Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40, 2.5 Gallon Jug,
Shell Rotella
Shell Rotella
8.9
Very Good
View on Amazon

About Diesel Engine Oil 15w-40 Full Synthetic

Click here to learn more about these products.

Ultra1Plus SAE 15W-40 Synthetic Blend Heavy-Duty Motor Oil API CK-4/SN - 1 Quart

ADVANCED 15W-40 SYNTHETIC BLEND OIL Protects modern older diesel engines API CK-4SN.. EXTENDS ENGINE LIFE Reduces wear controls soot build-up for long engine life.. EXCEPTIONAL PERFORMANCE Excellent oxidation stability viscosity control in extreme conditions.. IMPROVED FUEL ECONOMY Enhanced oil efficiency allows for extended drain intervals.. COLD WEATHER STARTS Formulated for smooth starting and pumpability in very cold temperatures..

Ultra1Plus SAE 15W-40 Conventional Heavy-Duty Motor Oil, API CI-4/SL

Cleans and extends engine life.. Provides fluidity during cold starts.. Reduces engine wear and excessive oil and fuel consumption.. Reduces the accumulation of sludge and the formation of deposits generated at high temperatures.. High resistance to oxidation allows longer cycle between oil change..

Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil (1-Gallon, Case of 3)

Full synthetic 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, oil breakdown, and improves low-temperature flow. Exceptional wear protection for longer life in a wide range of heavy-duty engine applications from pickup trucks to tractors to semi rigs. Enhanced fuel economy capability of 1.5 percent without compromising engine protection or durability compared to 15W-40 oils. Multi-functional dispersant additives provide an enhanced level of protection against the effects of soot, dirt, and other contaminants compared to previous formulation. Increased shear stability for better viscosity control and optimal engine oil pressure. Better cold-cranking properties and low-temperature pumpability for reaching critical engine parts faster. Case of three 1-gallon bottles with ergonomic design for easy handling and pouring. Advanced low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low-emission vehicles.

Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA, Case of 3

EXCELLENT WEAR PROTECTION IN HEAVY DUTY APPLICATIONS that can take a toll on critical internal moving parts. RESISTS OXIDATION AND FIGHTS DEPOSITS SLUDGE with higher quality synthetic base oils and special inhibitors. PROTECTS DURING COLD START UPS WHILE CONTROLING SOOT as heavy-duty equipment can sit idle for extended periods of time. ADVANCED FUEL ECONOMY up to 1.5 over 15W-40 conventional oils in on-highway operations. UNIQUE 5,000 MILES OIL DRAINS EXTENSION in Cummins X15X12 engines when average is 7mpg or higher. AMERICAN MADE FORMULATED to maximize your engines life and improve its performance. THE ONLY ONE exclusively endorsed and recommended by Cummins.

Triax Fleet Supreme ESP 15W-40 API CK-4 Full Synthetic Diesel Engine Oil, Friction Optimized and Boosted with Molybdenum and Nano-Boron, Superb Powerstroke Performance (5 Gallon Pail)

CRP organic, metallic, Moly plating technology for unsurpassed wear protection, oxidation, and high temp stability. Friction modified and VI stabilizer pre-boosted un-rivaled turbo-charger protection will not create deposits and ash on turbo bearings will not fry on the turbo. Contains state-of-the-art dispersal and ash control systems to keep your engine extremely clean. Extreme drain intervals capabilities 25,000-mile drain interval for pickups and 80,000 for class 8 semi-trucks. Eliminates the need to clean diesel particulate filters and is for use in virtually all diesel-powered pickups and heavy-duty trucks, both pre 2007 and post 2007 models fitted with emission control systems.

Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon, Single Pack)

Full synthetic 5W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, oil breakdown, and improves low-temperature flow. Exceptional wear protection for longer life in a wide range of heavy-duty engine applications from pickup trucks to tractors to semi rigs. Enhanced fuel economy capability of 1.5 percent without compromising engine protection or durability compared to 15W-40 oils. Multi-functional dispersant additives provide an enhanced level of protection against the effects of soot, dirt, and other contaminants compared to previous formulation. Increased shear stability for better viscosity control and optimal engine oil pressure. Better cold-cranking properties and low-temperature pumpability for reaching critical engine parts faster. Single 1-gallon bottle with ergonomic design for easy handling and pouring. Advanced low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low-emission vehicles.

Triax Fleet Ultra ESP 15W-40 API CK-4 Licensed Synthetic Blend, Moly and Boron Performance Boosted, Heavy Duty Diesel Engine Oil, OEM Compatible with Volvo, Mack, Cummins, DD (5 Gallon Pail)

Contains built-in performance boosters for friction reduction, oxidation inhibition, shear, and viscosity stability. Nano borate and organic molybdenum reinforced for outstanding wear reduction and heat management eliminates stiction and injector issues frees most stuck piston rings contains state-of-the-art dispersal and ash control systems to keep your engine extremely clean. API licensed synthetic blend product for the latest API CK-4 New CK-4 spec. This product is backwards compatible with virtually all heavy-duty diesel engines from all years on both US, Japanese and European heavy-duty trucks and equipment including previous CJ-4, CI-4, and CI-4 Plus specifications. Drain capabilities exceed 12,000 miles for farm trucks, 65,0000 miles for class 8 highway trucks, and 40,000 miles for in city, mixed traffic heavy-duty diesel trucks.

Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon Bottle

Excellent wear protection during severe operating conditions. Oil durability strong oxidation and viscosity control with less oil consumption. Better contamination control with superior soot-busting, deposit-dispersing capability. Strong stay-in-grade performance throughout the life of the oil. Friction modified with micron moly and penetrate.

Triax Fleet Supreme ESP 5W-40 API CK-4 Full Synthetic Diesel Engine Oil, Friction Optimized and Boosted with Molybdenum & Nano-Boron, Superb Powerstroke Performance (5 Gallon Pail)

Unique Additive Technology for UNSURPASSED WEAR PROTECTION, oxidation, and high temp stability. 60 lower wear than leading lubricants and standards. WIDE RANGE COMPATIBLE - Compatible with all heavy-duty diesel engines.. HIGHEST VISCOSITY INDEX any 5W-40 motor oil, of any brand, with exceptional stability and flow properties. Friction modified and VI stabilizer pre-boosted. Un-rivaled turbo-charger protection, will not create deposits and ash on turbo bearings will not fry on the turbo. Up to 4 Fuel economy vs any 15W-40. COLD FLOW - Exceptional cold flow down to - 46 F.. OUTSTANDING POWER-STROKE PERFORMANCE Including 6.0 L turbo diesel ELIMINATES STICTION AND INJECTOR ISSUES that plague Power-stroke engines - No need for additional additives - Contains state-of-the-art dispersal and ash control systems to keep your engine extremely clean.. EXTREME DRAIN CAPABILITIES 25,000 mile drain interval for pickups and 80,000 for class 8 semi-trucks. WHAT WILL YOU NOTICE THE FIRST TIME YOU SWITCH - Dramatic reduction of engine noise. Improved fuel economy by at least 2. Substantially longer drain intervals vs all other brands. Virtually no deposits on turbos. Significantly improved oil analysis results and engine durability..

Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil, API CK-4/SN | 5 Gallon Pail

Engine wear protection.. Strong shear stability provides stay-in-grade performance.. Minimizes Oil Consumption.. Enhanced oxidation control.. Resistant to viscosity and thermal breakdown at high temperatures..

Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40, 5 Gallon Pail

Better fuel economy - compared to 15W-40 oils Rotella offers enhanced fuel economy capability of 1.5 without compromising engine protection or durability. Improved wear performance - provides a significantly increased level of protection against harmful engine wear when compared to previous generation API CJ-4 engine oils. Improved deposit control - advanced multi-functional dispersant additives in combination with synthetic base oils provide an enhanced level of protection against the effects of soot, dirt and other contaminants. Emissions system compatibility - advanced low-ash formulation helps control blocking of or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency. Improved heat resistance - resists breakdown by heat to provide continuous protection throughout the service interval.

Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil 5W-40, 2.5 Gallon Jug, Pack of 2

Better fuel economy - compared to 15W-40 oils Rotella offers enhanced fuel economy capability of 1.5 without compromising engine protection or durability. Improved wear performance - provides a significantly increased level of protection against harmful engine wear when compared to previous generation API CJ-4 engine oils. Improved deposit control - advanced multi-functional dispersant additives in combination with synthetic base oils provide an enhanced level of protection against the effects of soot, dirt and other contaminants. Emissions system compatibility - advanced low-ash formulation helps control blocking of or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency. Improved heat resistance - resists breakdown by heat to provide continuous protection throughout the service interval.
Disclaimer