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🚛 Drive smarter, last longer — the ultimate diesel defense!
Schaeffer Manufacturing Co.'s SynShield OTR Plus 10W-30 is a premium synthetic heavy-duty diesel engine oil designed to maximize engine durability, fuel economy, and cold weather performance. Featuring proprietary friction modifiers Micron Moly and Penetro, it protects against wear, oxidation, soot, and deposits while meeting API CK-4 standards for modern emission-compliant trucks.



| ASIN | B06XYN4SKG |
| Brand Name | Schaeffer Manufacturing Co |
| Compatible with Vehicle Type | Truck |
| Container Type | Bottle |
| Country of Origin | USA |
| Customer Reviews | 4.9 4.9 out of 5 stars (103) |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Schaeffer Manufacturing Co. |
| Manufacturer Part Number | 0711CK4-012S |
| Model | 0711CK4-012S |
| Number of Packs | 1 |
| SAE J300 Viscosity Grade | 10W-30 |
| Size | 1 Quart |
| UPC | 744954027613 |
| Unit Count | 1 Count |
| Viscosity Level | Medium |
| What Is In the Box | 1 quart of oil |
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