On a bearing using an oiling ring as means of static oil feed, unless adverse conditions would indicate otherwise, how often should the oil be completely changed at a minimum?

Correct Answer: Option C — Annually

Static oiling ring systems operate in a relatively closed environment, but oil degrades over time due to oxidation and contamination. Annual oil changes are the industry standard to ensure the lubricant maintains its chemical stability, viscosity, and protective properties, preventing long-term damage to the bearing surfaces and the shaft.