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South Carolina | We are replacing the gear oil in the final drives on our cotton picker and the local Deere parts man suggested 80W90 GL5 while the operators manual suggests 85W140 GL5. He says the temps at harvest are not high enough to justify the higher viscosity gear oil. Our temps at harvest will probably not exceed 90 degrees and actually decline as harvest continues through the fall. The viscosity chart rates the 80W90 up to 95 degrees while the 85W140 is rated up to 120 degrees. Don't want the drain and replace the oil that I just put in. Any thoughts???? | |
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Differences in gear oil
