Shell Rotella T4 Triple Protection 15W-40 Heavy Duty Diesel Engine Oil, 18.9L – Case of 2
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Shell Rotella T4 Triple Protection 15W-40 Heavy Duty Diesel Engine Oil — 18.9L, Case of 2
Rotella T4 Triple Protection is a conventional heavy duty diesel engine oil engineered for engines that operate under sustained load and demanding conditions. Its proprietary additive system delivers simultaneous protection against wear, deposits, and oil breakdown — the three primary causes of diesel engine damage — in a single proven formulation.
This listing is for a case of two 18.9-litre jugs (37.8L total), making it an efficient choice for service operations, commercial users, or boat owners managing multiple engines who want a meaningful supply without moving to drum quantities.
Key Benefits
- Triple protection against wear, deposits, and oil degradation — proprietary chemistry developed for heavy duty diesel engines
- Compatible with modern low-emission engines — formulated to work with diesel particulate filters (DPF) and other emissions control systems
- Proven in older hard-working engines — robust protection for legacy diesel powerplants still in service
- Acid neutralization — controls combustion acids that cause corrosion and sludge buildup
- Thermal stability — resists viscosity breakdown under sustained high-temperature operation
Specifications
- Viscosity: 15W-40
- Volume: 18.9L per jug × 2 jugs = 37.8L total
- Base: Conventional
- Application: Heavy duty diesel engines — on-road, off-road, and marine
- API Service: CK-4/SN
- SKU: 852-550045128
Verify your engine manufacturer's recommended viscosity grade and API service category before use.
Also available in other sizes:
Rotella T4 15W-40, 5L (case of 3) | Rotella T4 15W-40, 9.5L (case of 2) | Rotella T4 15W-40, 946mL (case of 6) | Rotella T4 15W-40, 208.2L Drum
Looking for full synthetic? See the Rotella T6 Full Synthetic 5W-40, 5L.
Parts Desk Insights
Best use case: The 18.9L case of 2 (37.8L total) is the right format for marina service bays, commercial operators, or multi-engine boat owners who go through oil regularly and want a manageable jug size with meaningful volume. The 18.9L jug is easy to pour from and store compared to a drum, while still offering a lower cost-per-litre than smaller case formats. The 15W-40 grade covers the vast majority of naturally aspirated and turbocharged diesel marine engines operating in moderate to warm climates. For cold-weather operation or extended drain intervals, consider the Rotella T6 Full Synthetic 5W-40. For the highest-volume operations, the 208.2L drum delivers the best cost-per-litre.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.