Shell Rotella T4 Triple Protection 15W40 Diesel Engine Oil, 946mL – Case of 6 | 550049481
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Shell Rotella T4 Triple Protection 15W40 Diesel Engine Oil – 946mL | Case of 6 | Part #550049481
Shell Rotella T4 Triple Protection is one of the most widely used heavy-duty diesel engine oils in North America, backed by millions of miles of real-world field testing. The 15W40 multi-grade formulation provides reliable cold-start protection and maintains viscosity at high operating temperatures — making it a year-round choice for both modern low-emission diesel engines and older hard-working powerplants. This listing is for the 946mL (1 US quart) bottle, sold in cases of 6.
Triple Protection Formula
The T4 Triple Protection formula is engineered to defend against the three primary causes of diesel engine wear and failure:
- Wear protection — advanced additive package guards cylinder walls, bearings, and valve train components under high load
- Deposit control — keeps pistons and combustion chambers clean, maintaining engine efficiency over time
- Oil breakdown resistance — resists oxidation and thermal degradation to maintain performance throughout the oil change interval
Key Features
- SAE 15W40 multi-grade — suitable for year-round use in most climates
- Compatible with modern low-emission engines — formulated for engines with EGR, and suitable for use with diesel particulate filters (DPF) in many applications
- Suitable for older diesel engines — backward-compatible with legacy diesel powerplants
- Proprietary Shell formula — developed and validated through extensive field testing
Specifications
- Grade: SAE 15W40
- Application: Heavy-duty diesel engines (on-highway, marine auxiliary, stationary)
- Size: 946mL (1 US quart) per bottle
- Case quantity: 6 bottles per case
- Part number: 550049481
- Sold as: Case of 6 only
Parts Desk Insights
Best use case: The 946mL quart case is the right format for service shops and operators who want to keep individual top-up quantities on hand without committing to larger jugs — useful for topping off between oil changes, servicing multiple pieces of equipment with different fill volumes, or stocking a service truck. For larger single-fill volumes, the T4 Triple Protection is also available in 5L (3/case) – 550045135, 9.5L (2/case) – 550045125, 18.9L (2/case) – 550045128, and 208L drum – 550045148 for high-volume operations. If your application calls for a full synthetic diesel oil, the Shell Rotella T6 full synthetic is the next step up in the Rotella line.
Note: Sold in cases of 6 × 946mL bottles. Always confirm your engine manufacturer’s oil specification — viscosity grade, API service category, and any OEM approvals — before ordering.
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.