Best Synthetic Engine Oil For Diesel Engines: image
Editor's Pick

Compared to the previous API CJ-4 engine oils, Shell Rotella T6 5W-40 has an improved wear performance of up to 14%. The oil is also more resistant to corrosion than conventional oils and provides better low-temperature protection. It can be used in combination with petrol or diesel engines for increased fuel economy. Notably, it was approved by the National Highway Traffic Safety Administration (NHTSA) in 2015.

Best Budget

Mobil 1 Turbo Diesel Truck 5W-40 provides outstanding protection against sludge build-up and harmful deposits, according to the company’s technical data sheet. The product is recommended for applications under warranty as it has been tested in extreme conditions including extreme cold temperatures. Notably, Mobil 1 diesel trucks have an average operating temperature of 210°C. It also meets European standards for oil consumption. The engine is designed to provide maximum fuel efficiency with low emissions. It features anti-pollution technology.

Most Discussed

The OPEL/GM diesel LL B4 standard requires an outstanding detergent/dispersent power and a very low viscosity increase to drastically reduce oil consumption. The standard also specifies that it should not be used in conjunction with any other products, such as petrol or diesel engines. It further states that the product must meet the safety standards set by the National Highway Traffic Safety Authority (NHTSA). Notably, this comes amid reports that the fuel efficiency of cars has been affected.

Best Synthetic Engine Oil For Diesel Engines

Top 10 Best Synthetic Engine Oil For Diesel Engines

1
Why we chose it
  • Low SAPS fully synthetic motor oil for older generation diesel engines in passenger vehicles.
  • Item Package Weight: 10.44 pounds
  • 5 Liter
  • Specifically developed for engines equipped with diesel particulate filters (DPF).
Liqui Moly 2022 Diesel High Tech Synthetic 5W-40 Motor Oil - 5 Liter: image
98%
customers recommend this product
4.9/ 5
Mileage5
Longevity5
Value for money4.9
Top Pick
2
Why we chose it
  • Better fuel economy – compared to 15W-40 oils Rotella offers enhanced fuel economy capability of 1.5% without compromising engine protection or durability
  • Country of origin : United states
  • 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
Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon, Single Pack): image
98%
customers recommend this product
4.9/ 5
Longevity4.8
Mileage4.8
Value for money4.7
Sheerness4.6
3

Motul 109774 8100 X-Cess Gen2 5W-40 Motor Oil 1-Liter Bottle

56 ratings | 24 offers | 56 Reviews
Price: $16.99$32.92
Why we chose it
  • Country Of Origin :France
  • Package Weight :2.1Lbs
  • Product Type :Auto Accessory
  • Package Dimensions :6.4Cm L X11.6Cm W X20.8Cm H
Motul 109774 8100 X-Cess Gen2 5W-40 Motor Oil 1-Liter Bottle: image
96%
customers recommend this product
4.8/ 5
Value for money5
Mileage5
4
Why we chose it
  • Outstanding oxidation resistance supports long oil life in heavy duty engines
  • Superior synthetic base stocks provide faster, safe starts during freezing weather and enhanced thermal properties for hot weather operations
  • Superior wear protection for hardworking heavy-duty trucks and equipment
  • The Only One endorsed and recommended by Cummins
Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA, Case of 3: image
96%
customers recommend this product
4.8/ 5
Mileage4.7
Longevity4.7
Value for money4.5
Sheerness4.5
5
Why we chose it
  • For best performance, follow the manufacturer’s recommendations in your vehicle owner s manual.
Motul 007250-4PK 8100 X-cess 5W-40 Synthetic Gasoline and Diesel Engine Oil - 5 Liter Jug (Case Case of 4): image
98%
customers recommend this product
4.9/ 5
Mileage4.8
Value for money4.7
6

Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil – 1 Gallon

159 ratings | 11 offers | 159 Reviews
Price: $26.18$46.88
Why we chose it
  • Package Dimensions: 8.38 L x 12 H x 3.5 W (inches)
  • Fit type: Vehicle Specific
  • Package Weight : 7.8 pounds
  • Country of Origin : United States
Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil - 1 Gallon: image
94%
customers recommend this product
4.7/ 5
Mileage4.8
Value for money4.7
7
Why we chose it
  • Friction modified with micron moly and penetrate
  • Better contamination control with superior soot-busting, deposit-dispersing capability
  • Strong stay-in-grade performance throughout the life of the oil
  • Excellent wear protection during severe operating conditions
  • Oil durability: strong oxidation and viscosity control with less oil consumption
Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon Bottle: image
96%
customers recommend this product
4.8/ 5
Mileage4.4
Value for money4.3
8
Why we chose it
  • Outstanding wear protection
  • Wide viscosity range provides outstanding protection consistent with an SAE 40 grade oil at high temperatures, combined with the easy cold-start performance of a 5W rated oil
  • Exceptional resistance to high-temperature varnish and low-temperature sludge deposits to help keep engines clean
  • Improved protection against sludge and harmful deposits Excellent fuel economy benefits
  • Excellent high- and low-temperature performance Pours at temperatures as low as -53 degree Fahrenheit and protects at oil temperatures as high as 400 degree Fahrenheit
Mobil 1 122260 5W-40 Turbo Diesel Synthetic Motor Oil - 1 Gallon (Pack of 3): image
96%
customers recommend this product
4.8/ 5
9
Why we chose it
  • Country of Origin : United States
  • It satisfies the requirements as well as most other domestic and import diesel engine manufacturers
  • The Package Length of the Product is 8.0 inches
  • The Package Height of the Product is 14.0 inches
Ford Genuine XO-5W40-5QSD SAE 5W-40 Full Synthetic Diesel Motor Oil - 1.25 U.S. Gal (4.73L),Single Pack: image
96%
customers recommend this product
4.8/ 5
Longevity4.7
Mileage4.6
Value for money4.3
10
Why we chose it
  • For best performance, follow the manufacturer’s recommendations in your vehicle owner s manual.
Mobil Super 96819 15W-40 Delvac 1300 Motor Oil - 1 Gallon (Pack of 4): image
94%
customers recommend this product
4.7/ 5
Top Pick
Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon, Single Pack)
Shell Rotella T6 5W-40 diesel engine oil is a full synthetic motor oil that features exclusive Triple Protection Plus technology, formulated with fully synthetic base oils plus advanced additives to protect against wear, deposits, and oil breakdown. It also provides better low temperature flow and increased fuel economy performance, without compromising durability, compared to conventional SAE 15W-40 oils. Shell Rotella T6 5W-40 Full Synthetic motor oil is suitable for virtually all modern low-emission heavy duty engines and older hard working diesel engines (consult your owner's manual for heavy duty engine oil recommendations). With its wide range of specifications and approvals from many of the world's leading engine makers, it is an excellent choice for on-highway fleets, general haul, construction, agriculture, public-transport operators, and diesel pick-up trucks. Exceeds the requirements of the following industry specifications: API: CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4; ACEA E9. Meets or exceeds the following OEM requirements: Allison TES 439; Caterpillar ECF-2/ECF-3; Cummins CES 20086, 20081; Detroit Fluid Specification (DFS) 93K222, 93K218; Ford WSS-M2C171-F1; JASO DH-2, JASO MA/MA2; MAN M3575; MACK EOS-4.5; MB-Approval 228.31; Volvo VDS-4.5, 4.
Ranking the Brands
Liqui Moly: 10.00%
Shell Rotella: 10.00%
Motul: 20.00%
Valvoline: 10.00%
Lucas Oil: 10.00%
Schaeffer Manufacturing Co: 10.00%
Mobil 1: 20.00%
Ford: 10.00%

Comparison Table

Сomparison: Liqui Moly 2022 Diesel High Tech Synthetic 5W-40 Motor Oil - 5 Liter: imageСomparison: Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon, Single Pack): imageСomparison: Motul 109774 8100 X-Cess Gen2 5W-40 Motor Oil 1-Liter Bottle: imageСomparison: Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA, Case of 3: imageСomparison: Motul 007250-4PK 8100 X-cess 5W-40 Synthetic Gasoline and Diesel Engine Oil - 5 Liter Jug (Case Case of 4): imageСomparison: Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil - 1 Gallon: imageСomparison: Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon Bottle: imageСomparison: Mobil 1 122260 5W-40 Turbo Diesel Synthetic Motor Oil - 1 Gallon (Pack of 3): imageСomparison: Ford Genuine XO-5W40-5QSD SAE 5W-40 Full Synthetic Diesel Motor Oil - 1.25 U.S. Gal (4.73L),Single Pack: imageСomparison: Mobil Super 96819 15W-40 Delvac 1300 Motor Oil - 1 Gallon (Pack of 4): image
Liqui Moly 2022 Diesel High Tech Synthetic 5W-40 Motor Oil – 5 LiterShell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon, Single Pack)Motul 109774 8100 X-Cess Gen2 5W-40 Motor Oil 1-Liter BottleValvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA, Case of 3Motul 007250-4PK 8100 X-cess 5W-40 Synthetic Gasoline and Diesel Engine Oil – 5 Liter Jug (Case Case of 4)Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil – 1 GallonSchaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon BottleMobil 1 122260 5W-40 Turbo Diesel Synthetic Motor Oil – 1 Gallon (Pack of 3)Ford Genuine XO-5W40-5QSD SAE 5W-40 Full Synthetic Diesel Motor Oil – 1.25 U.S. Gal (4.73L),Single PackMobil Super 96819 15W-40 Delvac 1300 Motor Oil – 1 Gallon (Pack of 4)
Package InformationJugBottleBottleBottleJugJugBottleBottleBottleBottle
Viscosity5w-405W-405w-405W405w-4015w-4015w-405w-405w-4015w-40
BrandLiqui MolyShell RotellaMotulValvolineMotulLucas OilSchaeffer Manufacturing CoMobil 1FordMobil 1
Liquid Volume5 Liters128 Fluid Ounces33.81 Fluid Ounces12 Quarts5 Liters3.79 Milliliters16384 Fluid Ounces128 Fluid Ounces160 Fluid Ounces128 Fluid Ounces
ManufacturerLiqui MolyRotellaMotulValvolineMotulLucas OilMobil 1FordMobil 1
Item Weight10 pounds7.48 pounds2 pounds23.9 pounds40.5 pounds7.58 pounds23.8 pounds9.25 pounds1 pounds
Product Dimensions12.5 x 9.5 x 3.5 inches11.31 x 8.1 x 4.31 inches8 x 4.6 x 2.6 inches14.5 x 9.13 x 11.44 inches15.4 x 11.3 x 11.7 inches8.37 x 3.5 x 12 inches10.94 x 8.1 x 4.1 inches9.1 x 8.6 x 4.4 inches16.75 x 11.75 x 9.6 inches
Is Discontinued By ManufacturerNoNoYesNoNoNoNo
Vehicle Service TypeMotorcycle, Car, TruckCarTruckCarCarTruck

Products with 5 star rating

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