Eaton 80W-140 synthetic gear lubricant is an API GL-5 extreme pressure lubricant designed to promote longer gear life and better operating economy, thus improving fuel economy in heavy, mid and light-duty applications. It is formulated using synthetic base stock, which has a high viscosity index and an exceptionally low pour point.
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| OEM Approval | Specification |
| API | GL-5, MT-1 |
| MIL | MIL-PRF-2105E |
| SAE | SAE J 2360 |
| ArvinMeritor | O76-N, O76-E |
| DANA | SHAES-429 Rev A |
| International | TMS 6816 |