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Similar ![]() Schaeffer Manufacturing Co Schaeffer Manufacturing Co. 0700CK4-006 SynShield Durability Advantage Diesel Engine Oil 15W-40, 1-Gallon Bottle (Pack of 6) | Similar ![]() Schaeffer Manufacturing Co Schaeffer Manufacturing Co. 0700CK4-012 SynShield Durability Advantage 15W-40 Diesel Engine Oil, 12-Quart Bottle (Pack of 12) | ||||||
|---|---|---|---|---|---|---|---|
| Rating | |||||||
| Model | DOCS15W40-3 | DOCS5W40-3 | DOCS15W40-4 | DOCS5W40-4 | DOCS10W30-4 | 0700CK4-006 | 0700CK4-012 |
| Color | Full Synthetic 15W-40 | Full Synthetic 5W-40 | Full Synthetic 15W-40 | Full Synthetic 5W-40 | Full Synthetic 10W-30 | — | — |
| Viscosity Grade | 15W-40 | 5W-40 | 15W-40 | 5W-40 | 10W-30 | 15W-40 | 15W-40 |
| Base Type | Full Synthetic | Full Synthetic | Full Synthetic | Full Synthetic | Full Synthetic | Full Synthetic | Full Synthetic |
| Features | Diesel Engine | Diesel Engine | Diesel Engine | Diesel Engine | Diesel Engine | Diesel Engine | Diesel Engine |
| Certifications | API CK-4 | API CK-4 | API CK-4 | API CK-4 | API CK-4 | API CK-4 | API CK-4 |
About this product
- Proven In Testing. Independent testing showed up to 71 percent less engine wear in the Cummins ISM severe service run and up to 78 percent lower oil consumption against the CK-4 specification in the CAT 1N test.
- Fits Your Diesel. Runs in Cummins, Powerstroke, and Duramax trucks, fleet vehicles, and equipment, and is compatible with the 3.0L EcoDiesel.
- Built For Heat And Load. The 15W-40 grade holds a strong oil film for towing and high-load work, and a 414F flash point stays stable under sustained engine heat.
- Three Gallon Fill. Twelve quarts covers a full 6.7L Cummins or 6.6L Duramax change. The 6.7L Powerstroke needs about 13 quarts, so choose four gallons. Confirm in your manual.
- Service Intervals. Change every 10,000 to 15,000 miles on normal duty, or 7,500 to 10,000 under heavy towing and severe use. Meets the GHG 17 emissions standard for modern diesels.
Specifications
- Brand
- Doc's Diesel
- Model
- DOCS15W40-3
- Viscosity
- 15W-40
- Base Type
- Full Synthetic
- Features
- Diesel Engine
- Certifications
- API CK-4
- Colour
- Full Synthetic 15W-40
- Units in box
- 3
- Warranty
- Limited Warranty
- Part number
- DOCS15W40-3
- Manufacturer
- Doc's Diesel
- UPC
- 810180349703
- GTIN
- 00810180349703






