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⚙️ Drive smarter, last longer — the ultimate shield for your engine!
Schaeffer Manufacturing’s SynShield OTR Plus 10W-30 is a premium synthetic heavy-duty diesel engine oil designed to maximize fuel economy and engine durability. Engineered with proprietary friction modifiers Micron Moly and Penetro, it excels in cold starts, heat resistance, and soot control, meeting and exceeding API CK-4 standards for modern emission-compliant diesel engines.



| 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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