| 摘要 |
PROBLEM TO BE SOLVED: To contribute to comprehensive resource saving and environmental conservation, by improving durability of engine by means of constant keeping of lubricating oil effect and enhancing fuel economy. SOLUTION: In a management of an oil level, an automatic or a manual controller is arranged to a conventional type detector and a warning device. A method in which engine lubricating oil is promptly used as a fuel without periodically exchanging the lubricating oil or discarding the lubricating oil as a waste oil. The lubricating oil appropriately mixed in a fuel tank 4 is supplied as the fuel to an engine 1 through a filter.
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