3.4 Change Oil and Oil Filter
Note: Recommended oil is: Natural Gas Engines Oil (NGEO); CI-4 or above.
Note: For continuous operation in extreme temperatures or in excessively dusty, dirty environments, rely
on oil analysis to determine maintenance intervals.
Note: For best results, change engine oil while the engine is still warm from operation.
1. Remove the oil pan drain plug and drain oil completely.
2. Inspect drain plug gasket (replace if necessary) and clean plug seating surface.
3. Inspect magnetic plug for iron and ferrous material. If this exists, consider an oil analysis to
determine the source of debris.
4. Reinstall drain plug and tighten securely.
5. Remove the oil filter cover by turning the 32 mm cover counter-clockwise. Remove oil filter(s).
May need to wiggle back and forth in 4 directions to loosen o- ring.
6. Wipe filter base clean. Then apply a thin coat of motor oil to the o-ring on the new oil filter(s).
7. Install oil filter. Tighten the filter cover by hand until the gasket contacts the base. Tighten to 40
nm.
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