Shell Rotella T6 Full Synthetic Heavy Duty Diesel Engine Oil, 5W-40, 5L
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Shell Rotella T6 Full Synthetic 5W-40 Heavy Duty Diesel Engine Oil — 5L
Rotella T6 is a full synthetic heavy duty diesel engine oil engineered for modern diesel engines that work hard in demanding conditions. The 5W-40 viscosity grade flows quickly at cold start to protect critical engine components, then maintains a stable protective film at high operating temperatures — keeping your engine running clean and strong across a wide range of conditions.
Key Benefits
- Triple protection against wear, deposits, and oil breakdown — advanced additive chemistry keeps internals clean and protected
- Improved fuel economy — low-friction synthetic base oil reduces internal drag without sacrificing protection
- Acid control — neutralizes combustion byproducts that cause corrosion and sludge buildup
- Cold-weather performance — 5W cold-start rating ensures fast oil circulation even in low temperatures
- Extended drain intervals — full synthetic formulation resists thermal breakdown longer than conventional oils
Specifications
- Viscosity: 5W-40
- Volume: 5 Litres
- Base: Full Synthetic
- Application: Heavy duty diesel engines
- SKU: 852-550045390
Compatible with a wide range of diesel-powered marine, commercial, and recreational engines. Check your engine manufacturer's specifications to confirm viscosity and API service category requirements.
Also available: Shell Rotella T6 5W-40 in 18.9L | Shell Rotella T1 Single-Grade 40W, 5L | Shell Rotella T1 Single-Grade 30W, 5L
Parts Desk Insights
Best use case: Rotella T6 5W-40 is the go-to choice for high-output diesel engines that see variable operating temperatures — including turbocharged inboards, diesel sterndrives, and commercial marine applications where extended service intervals matter. The 5W-40 grade is particularly well-suited for year-round use in climates with cold winters, as it flows faster at startup than a straight 15W-40. If your engine spec calls for a 5W-40 or CJ-4/CK-4 rated oil, this is a strong fit. For engines requiring a straight-weight or 15W-40, see the Rotella T4 or T1 options in our lineup.
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.