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Full Synthetic 15W-40 ![]() Doc's Diesel Doc's Diesel 15W-40 Full Synthetic Heavy Duty Oil, CK-4 High Heat, 4 Gal | Similar ![]() Schaeffer Manufacturing Co Schaeffer Manufacturing Co. 9000CK4-006 SynShield OTR Plus Full Synthetic Diesel Engine Oil 5W-40, 1-Gallon Bottle (Pack of 6) | ||||||
|---|---|---|---|---|---|---|---|
| Rating | |||||||
| Model | DOCS5W40-4 | DOCS10W30-4 | DOCS15W40-4 | DOCS15W40-3 | DOCS5W40-3 | 9000CK4-006 | — |
| Color | Full Synthetic 5W-40 | Full Synthetic 10W-30 | Full Synthetic 15W-40 | Full Synthetic 15W-40 | Full Synthetic 5W-40 | — | — |
| Viscosity Grade | 5W-40 | 10W-30 | 15W-40 | 15W-40 | 5W-40 | 5W-40 | 5W-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 | — |
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.
- Cold-Start Performance. The 5W winter grade flows fast at low temperature for quick lubrication at startup, and a 428F flash point holds the oil stable under sustained engine heat.
- Four Gallon Fill. Sixteen quarts covers a full change on 6.7L Cummins, 6.7L Powerstroke, or 6.6L Duramax with oil to spare. Confirm exact capacity in your owner 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
- DOCS5W40-4
- Viscosity
- 5W-40
- Base Type
- Full Synthetic
- Features
- Diesel Engine
- Certifications
- API CK-4
- Colour
- Full Synthetic 5W-40
- Units in box
- 4
- Warranty
- Limited Warranty
- Part number
- DOCS5W40-4
- Manufacturer
- Doc's Diesel
- UPC
- 810180348973
- GTIN
- 00810180348973






