Can engine manufacturers require oil changes in order to honour their warranty?
No! Engine oil change intervals are recommended by most manufacturers for warranty purposes. As long as the condition of the oil meets the manufacturer specifications, the oil does not have to be changed to honour the warranty. The COT Oil Processor insures that the oil continuously meets these requirements. Manufacturers should honour engine warranty claims as long as accurate and periodic oil analysis reports are taken at the manufacturer’s recommended oil change intervals, stating that the oil is suitable for continued use.