AMSOIL recently released a diesel engine oil designed for fleets and budget-minded diesel owners called OE 15W-40 Synthetic Diesel Oil. This product meets the latest API CJ-4 specification and is suitable for off-road, heavy-duty diesel applications, as well as diesel pickups from all model years. Here is Q&A article on this new product.

1. Question: Why did AMSOIL develop AMSOIL OE 15W‐40 Synthetic Diesel Oil?

Answer: Many vehicle owners are interested in the significant benefits of AMSOIL synthetic lubricant technology but want to maintain their vehicles by changing their oil at manufacturer recommendations. AMSOIL recognized a need for these vehicle and equipment owners to have a full synthetic AMSOIL product meeting their unique performance and pricing requirements.

In addition, due to persistent fuel dilution issues in 2007 and newer light‐duty turbo diesels and certain Caterpillar heavy‐duty engines, AMSOIL Premium 5W‐40 Synthetic Diesel Oil (DEO) and Premium 15W‐40 Synthetic Diesel Oil (DME) cannot be used for extended oil drain intervals for these popular vehicles. AMSOIL OE 15W‐40 Synthetic Diesel Oil (OED) is a cost effective alternative for these owners/operators who desire the benefits of AMSOIL synthetic oil but are not able to extend oil drain intervals because of persistent engine oil fuel dilution issues.

2. Question: What is the recommended drain interval for AMSOIL OE 15W‐40 Synthetic Diesel Oil?

Answer: Similar to AMSOIL OE gasoline motor oils, AMSOIL OE 15W‐40 Synthetic Diesel Oil is recommended for use at the drain intervals recommended by the original equipment manufacturer (OEM). Drivers should refer to their owner’s manuals for specific oil change interval recommendations.

3. Question: How is AMSOIL OE 15W‐40 Synthetic Diesel Oil different from AMSOIL Premium API CJ‐4 15W‐40 Synthetic Diesel Oil?

Answer: Both products are API CJ‐4 rated, meeting the latest specifications for diesel oils and emission systems protection. AMSOIL OE 15W‐40 Synthetic Diesel Oil is designed with the additive technology and lower total base number (TBN) to provide performance and protection benefits over the OEM stated drain intervals. AMSOIL Premium 15W‐40 Synthetic Diesel Oil is designed for significantly extended drain intervals and outstanding wear protection and performance for consumers and fleets interested in the lowest cost solution for crankcase lubrication.

4. Question: What is the advantage of using AMSOIL OE 15W‐40 Synthetic Diesel Oil?

Answer: AMSOIL OE Synthetic Diesel Oil provides outstanding performance and engine protection that consumers have come to expect from AMSOIL products. AMSOIL OE 15W‐40 Synthetic Diesel Oil is formulated with synthetic base oils that provide inherent oxidation resistance that withstands heat and helps reduce deposits. AMSOIL OE Synthetic Diesel Oil provides easier cold temperature starts and rapid start‐up protection. Formulated to meet API CJ‐4 specifications, AMSOIL OE 15W‐40 Synthetic Diesel Oil is a low‐ash chemistry designed for modern diesel emissions systems, including exhaust gas recirculation (EGR) and diesel particulate filters (DPF).

AMSOIL OE Synthetic Diesel Oil provides optimal performance for demanding diesel applications; offered at lower cost than DME and DEO, it serves as a cost conscious option for applications that must operate at OEM drain intervals.

5. Question: What are the recommended filter change intervals? What about by‐pass filtration systems?

Answer: AMSOIL recommends that the oil filter be replaced at each oil change as recommended by the original equipment manufacturer. When using an AMSOIL by‐pass filtration system, refer to the Bypass Oil Filter Data Bulletin (G498) for more information.

6. Question: For what applications is AMSOIL OE 15W‐40 Synthetic Diesel Oil recommended?

Answer: AMSOIL OE Synthetic Diesel Oil is recommended for on‐ and off‐road diesel engines and, where appropriate, gasoline engines requiring any of the following specifications:

•API CJ‐4, CI‐4+, SM…
•ACEA E9
•DDC 93K218
•Cummins CES 20081
•MB 228.31
•CAT EFC‐3, ECF‐2, ECF‐1‐a
•Mack EO‐O Plus
•Volvo VDS‐4
•MAN 3575
•Renault RLD‐3
•MTU Type 2.1

7. Question: In what package sizes is AMSOIL OE Diesel Oil available?

Answer: AMSOIL OE Synthetic 15W‐40 Diesel Oil is available in the following package sizes:

•Quart
•Gallon
•2.5 Gallon
•30 Gallon Drum
•55 Gallon Drum
•275 Gallon Tote
•Bulk

8. Question: What are the primary markets or customers for AMSOIL OE 15W‐40 Synthetic Diesel Oil?

Answer: Diesel fleets, installers and diesel owners who have traditionally changed their oil at vehicle manufacturer recommended intervals are ideal markets for AMSOIL OE Synthetic Diesel Oil. Customers who desire a higher quality oil with standard manufacturer drain intervals at a cost‐friendly price point is a segment of the market that AMSOIL OE Synthetic Diesel Oil would appeal to.

For more information, feel free to contact us.