Advertising Disclosure 15w40 Oil Comparison - July 2025
4 Best 15w40 Oil In Canada
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you9.7
1Shell RotellaShell Rotella T6 Full Synthetic 15W-40 Motor Oil, 1 Gallon (3 Pack)
Main highlights- Protection in extreme operating conditions and climates
- 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
- 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*
- Improved wear performance versus API CJ-4 technology
- 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
- For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owner’s manual
- Compatibility with exhaust emissions control systems
- Better cold cranking properties and low-temperature pumpability (compared to conventional and synthetic blend 15W-40 motor oil)
9.6
2Shell RotellaShell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (5L, Single Pack)
Main highlights- Single 5-litre bottle with ergonomic design for easy handling and pouring
- 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
- 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)
- Better cold-cranking properties and low-temperature pumpability for reaching critical engine parts faster
- Advanced low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low-emission vehicles
9.3
3Shell RotellaShell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil (5L, Single Pack)
Main highlights- Synthetic blend 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
- Single 5-litre bottle with ergonomic design for easy handling and pouring
- Improves low-temperature flow (compared to conventional 15W-40 oils)
- Improved oxidation performance for increased resistance to oil breakdown under high temperatures compared to the previous formulation
- Ideal for on-highway fleets, construction, and agricultural machinery, and diesel pickup trucks — including high-power vehicles that require resistance to heat and stress
- Helps control engine deposits for reliability at extended oil drain intervals (always follow the OEM recommended oil drain interval)
- Controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests
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Features
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We ensure an evaluation of the ratings using references all over the internet for each product. With the help of our AI technology and professional review teams, we give weight to the worth of individual user experiences.Popularity
Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.Value for money
BestChoices.com compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
BestChoices.com compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.