10 Best Api Cj 4 Diesel Engine Oil of 2025

Tested and Reviewed: Top 10 Api Cj 4 Diesel Engine Oil deals with expert ratings from 8.1 to a perfect 10

April 2026 Edition

Editor's Choice

9.7

Valvoline

Valvoline Heavy Duty Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon

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Editor's bottom line:

“This api cj 4 diesel engine oil is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Heavy duty synthetic blend with targeted additive technology for critical component protection in extreme operating conditions and temperatures
35% better wear protection vs. industry standard in Cummins ISB engine test
Designed for extended oil life in high heat
Engineered to control wear, deposits and oil breakdown while meeting low emission requirements
Proven to maximize diesel engine life
Meets or exceeds requirements of API Service CK-4, CJ-4, CI-4 PLUS, CI-4, CH 4, & SN and approved or recommended for Cummins CES 20086, Ford WSS-M2C171-F1, Volvo VDS-4.5, Mack EOS-4.5, Detroit Diesel DFS 93K222, and Caterpillar ECF-3

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Picked by 397 people today

9.5

Shell Rotella

Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil, 1 Gallon (3 Pack)

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Main Highlights

Synthetic blend 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
Ideal for on-highway fleets, construction, and agricultural machinery, and diesel pickup trucks including high-power vehicles that require resistance to heat and stress
Triple Protection Plus technology offers better low-temperature flow, which delivers excellent equipment protection, long engine life, and maintains viscosity control under high temperatures
Delivers good engine cleanliness and protection against piston deposits, ensuring engine and component reliability at extended oil drain intervals
Advanced low-ash formulation helps control the blocking or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency
Controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests
Limited warranty valid up to 10 years or 300,000 miles (whichever comes first) if you exclusively use Shell Rotella T5 Synthetic Blend heavy-duty engine oil*
Meets or exceeds the following industry specifications: API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, SN; ACEA E11; JASO DH-2
Meets or exceeds the following OEM specifications: Caterpillar ECF-2, ECF-3; Cummins CES 20086, 20081; Detroit Fluid Specification (DFS) 93K222, 93K218; Allison TES 439; DTFR 150100 (prey. MB 228.31); Deutz DOC III-18 LA; Ford WSS-M2C171-F1; MACK EO-S 4.5, EO-O Premium Plus; MAN M 3775; MTU Category 2.1; Volvo VDS 4.5, VDS-4
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual

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9.5

Chevron

Delo 400 XLE Heavy Duty Synblend Diesel Engine Oil 15W-40, 1 Gallon, Pack of 1

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Main Highlights

A premium synthetic blend, long drain mixed-fleet engine oil specifically formulated for on- highway applications, including 2017 greenhouse gas (GHG 17) compliant diesel engines
Isosyn Advanced Technology: The Next Generation of Heavy Duty Engine Oil Chemistry - engineered to deliver longer oil life, better wear protection and longer engine life
Isoclean: Certified clean - ensure your lubricants meet OEM cleanliness requirements to help you minimize downtime, reduce maintenance costs and extend equipment life
Provides high performance piston deposit control and turbocharger protection due to its superb oxidation performance. Its high performing detergent and dispersant additives provide excellent diesel engine component protection.
Exceptional soot dispersancy and wear control - Cylinders, pistons, rings, and valve train components are well protected against wear and corrosion, providing optimum service life and minimal maintenance, contributing to maximum equipment utilization and minimal downtime.

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9.2

Shell Rotella

Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil, 1 Gallon

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Main Highlights

Full synthetic 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
Formulated to deliver increased protection against oxidation and enhanced deposit control/cleanliness
Better cold cranking properties and low-temperature pumpability (compared to conventional and synthetic blend 15W-40 motor oil)
Improved wear performance versus API CJ-4 technology
Compatibility with exhaust emissions control systems
Protection in extreme operating conditions and climates
Limited warranty valid up to 15 years or 500,000 miles (whichever comes first) if you exclusively use Shell Rotella T6 Full Synthetic Technology heavy-duty engine oil*
Meets or exceeds the following industry requirements: API CK-4, CJ-4, CI-4 Plus, CI-4, SN; ACEA E11; JASO DH-2, MA/MA2
Meets or exceeds the following OEM specifications: Caterpillar ECF-2/ECF-3; Cummins CES 20086, 20081; Detroit Fluids Specification (DFS) 93K222, 93K218; DTFR 15C100 (prev. MB 228.31); MACK EOS-4.5; MAN M 3775; Ford WSS-M2C171-F1; Allison TES 439; Volvo VDS-4.5
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual

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9.0

Valvoline

Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon

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Main Highlights

Full synthetic formula is proven to maximize diesel engine life
35% reduction in valve train wear vs. industry standards as tested in Cummins ISB engine test
Engineered to control wear, deposits and oil breakdown while meeting low emission requirements
Up to 28% longer oil life vs. industry standards as tested in Volvo T-13 engine test
Ultimate protection against severe temperatures
Meets or exceeds requirements of API Service CK-4, CJ-4, CI-4 PLUS, CI-4, CH 4, & SN and approved or recommended for Cummins CES 20086, Ford WSS-M2C171-F1, Volvo VDS-4.5, Mack EOS-4.5, Detroit Diesel DFS 93K222, and Caterpillar ECF-3

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8.8

Shell Rotella

Shell Rotella T6 Full Synthetic 10W-30 Diesel Engine Oil, 1 Gallon (3 Pack)

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Main Highlights

Full synthetic 10W-30 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
Provides the performance you expect from a full synthetic engine oil in the viscosity grade you prefer and trust
Extended drain capability for more uptime
Improved wear performance versus API CJ-4 technology
Compatibility with exhaust emissions control systems
Excellent choice for operators in locations with large ambient temperature ranges
Limited warranty valid up to 15 years or 500,000 miles (whichever comes first) if you exclusively use Shell Rotella T6 Full Synthetic Technology heavy-duty engine oil*
Meets or exceeds the following industry requirements: API: CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4; ACEA E11; JASO DH-2
Meets or exceeds the following OEM specifications: Caterpillar ECF-2/ECF-3; Cummins CES 20086, 20081; Detroit Fluid Specification (DFS) 93K222, 93K218; Deutz DQC III-18 LA; DTFR 15C100 (prev. MB 228.31); Ford WSS-M2C171-F1; MACK EOS-4.5; MAN M 3775; Volvo VDS-4.5
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual

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8.6

Shell Rotella

Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil, 1 Gallon

Free Shipping

Main Highlights

Synthetic blend 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
Ideal for on-highway fleets, construction, and agricultural machinery, and diesel pickup trucks including high-power vehicles that require resistance to heat and stress
Triple Protection Plus technology offers better low-temperature flow, which delivers excellent equipment protection, long engine life, and maintains viscosity control under high temperatures
Delivers good engine cleanliness and protection against piston deposits, ensuring engine and component reliability at extended oil drain intervals
Advanced low-ash formulation helps control the blocking or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency
Controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests
Limited warranty valid up to 10 years or 300,000 miles (whichever comes first) if you exclusively use Shell Rotella T5 Synthetic Blend heavy-duty engine oil*
Meets or exceeds the following industry specifications: API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, SN; ACEA E11; JASO DH-2
Meets or exceeds the following OEM specifications: Caterpillar ECF-2, ECF-3; Cummins CES 20086, 20081; Detroit Fluid Specification (DFS) 93K222, 93K218; Allison TES 439; DTFR 150100 (prey. MB 228.31); Deutz DOC III-18 LA; Ford WSS-M2C171-F1; MACK EO-S 4.5, EO-O Premium Plus; MAN M 3775; MTU Category 2.1; Volvo VDS 4.5, VDS-4
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual

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8.3

Shell Rotella

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

Free Shipping

Main Highlights

Full synthetic 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
Formulated to deliver increased protection against oxidation and enhanced deposit control/cleanliness
Better cold cranking properties and low-temperature pumpability (compared to conventional and synthetic blend 15W-40 motor oil)
Improved wear performance versus API CJ-4 technology
Compatibility with exhaust emissions control systems
Protection in extreme operating conditions and climates
Limited warranty valid up to 15 years or 500,000 miles (whichever comes first) if you exclusively use Shell Rotella T6 Full Synthetic Technology heavy-duty engine oil*
Meets or exceeds the following industry requirements: API CK-4, CJ-4, CI-4 Plus, CI-4, SN; ACEA E11; JASO DH-2, MA/MA2
Meets or exceeds the following OEM specifications: Caterpillar ECF-2/ECF-3; Cummins CES 20086, 20081; Detroit Fluids Specification (DFS) 93K222, 93K218; DTFR 15C100 (prev. MB 228.31); MACK EOS-4.5; MAN M 3775; Ford WSS-M2C171-F1; Allison TES 439; Volvo VDS-4.5
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual

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8.1

Mobil

Mobil Delvac 1 Advanced Full Synthetic Diesel Engine Oil 5W-30, 1 Gal

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Main Highlights

Advanced full synthetic diesel engine oil that helps to extend engine life and fuel economy potential* of modern diesel engines operating in severe conditions
Formulated to help high-performance diesel engines with turbocharger, direct-injection, low-emission designs, and low-sulfur and biodiesel fuel formulations
Provides excellent oxidation performance, anti-wear, and anti-scuff properties that helps to reduce engine deposits and keep engines running reliably
Excellent low-temperature performance for increased oil flow to critical bearing surfaces at startup and controlling low-temperature sludge formation
Provides outstanding protection against oil thickening and degradation, helping to reduce the number of oil changes and oil disposal needs

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8.1

STAR BRITE

STAR BRITE Pro Star Super Premium Motor Oil SAE 15W-40 - High Performance, Heavy-Duty Engine Protection - Meets API CI, CJ-4, & More - 32 OZ

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Main Highlights

ENHANCED ENGINE LIFE & HEAVY-DUTY PROTECTION - Minimizes engine wear for extended life in both diesel and gasoline engines, ensuring reliability under demanding conditions
COMPREHENSIVE INDUSTRY STANDARDS MEETING - Meets critical specifications like API CI, CJ-4, ACEA E3 & E5, ideal for engines requiring stringent protection levels
WIDE COMPATIBILITY ACROSS ENGINE BRANDS - Compatible with Caterpillar, Cummins, Detroit Diesel, Mack, Navistar, Volvo, and more, covering a vast array of engine requirements
EXCEEDS OEM REQUIREMENTS WITHOUT VOIDING WARRANTIES - Ensures optimal engine performance and longevity, supporting engines specifying SAE 15W40 grade
VERSATILE APPLICATION FOR DIVERSE ENGINE NEEDS - Suitable for engines needing Cummins CES 20077 to 20071, Mack EO-M Plus, Volvo VDS and VDS-2, and more
INDUSTRY-RECOMMENDED FORMULATION - Endorsed for applications requiring Global DHD-1 performance, including Allison C4 and JASO DH1 standards
OPTIMIZE ENGINE PERFORMANCE & PROTECTION - Use according to manufacturer recommendations to maintain peak engine performance and ensure long-term reliability
PROUDLY AMERICAN, TRUSTED GLOBALLY - Star brite, a leader in marine, auto, RV, and home care since 1973, made in the USA for unmatched quality and performance

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Our Best Overall Choice

Best Choice

9.7

Valvoline

Valvoline Heavy Duty Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Heavy duty synthetic blend with targeted additive technology for critical component protection in extreme operating conditions and temperatures
35% better wear protection vs. industry standard in Cummins ISB engine test
Designed for extended oil life in high heat
Engineered to control wear, deposits and oil breakdown while meeting low emission requirements
Proven to maximize diesel engine life
Meets or exceeds requirements of API Service CK-4, CJ-4, CI-4 PLUS, CI-4, CH 4, & SN and approved or recommended for Cummins CES 20086, Ford WSS-M2C171-F1, Volvo VDS-4.5, Mack EOS-4.5, Detroit Diesel DFS 93K222, and Caterpillar ECF-3

Show Price

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