The best lubricant for traditional ceiling fan motors equipped with oil ports is non-detergent SAE 20 or SAE 10 electric motor oil. You should strictly avoid using heavy multi-purpose oils, cooking oils, or solvent-based sprays like WD-40 because they gummy up over time, attract dust, and gum the bearings. Furthermore, modern ceiling fans with sealed ball bearings require no lubrication at all. You can troubleshoot bearing maintenance safely by shutting off power at the breaker before inspecting the motor. You can verify that your corrective action is successful when applying two or three drops of approved non-detergent electric motor oil into the designated oil port ensures smooth, silent bearing rotation without gumming up internal components.
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