Synthetic 15W40 Marine Diesel Engine Oil AMEQTC
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
AMEQTC is a synthetic 15W-40 heavy-duty diesel and marine engine oil designed for demanding diesel applications. AMSOIL describes this oil as suitable for marine engines as well as other heavy-duty diesel use, with a formula focused on wear protection, deposit control, and resistance to heat breakdown. The AME product family is also described as having a high TBN of 12 to help control acids from combustion blow-by and EGR.
Key Features
- Synthetic 15W-40 diesel and marine engine oil
- Designed for heavy-duty diesel and marine applications
- Helps protect against wear, soot, deposits, and oxidation
- Built for strong performance in high-heat operating conditions
- Product family is described with a 12 TBN for acid control
- AMEQTC is the quart-size product code within the AME line.
Application Notes
This oil is marketed for a wide variety of diesel and marine engines, especially where a 15W-40 heavy-duty diesel oil is specified. As always, confirm the correct oil grade and specification against the engine manufacturer’s manual before use.
Parts Desk Insight
This is a solid option when you want a synthetic 15W-40 marine diesel oil with broader heavy-duty diesel coverage as well. The main selling point is its combination of marine-duty protection, synthetic stability, and strong deposit-control focus.
Shipping: Ships same or next day for fast Canada wide shipping. âš“
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.