NOTICE
Do not switch lubricant brands indiscriminately because some lubricants interact chemically when mixed. Use of inferior lubricants can damage the engine. (00184a)
Engine oil is a major factor in the performance and service life of the engine. Always use the proper grade of oil for the lowest temperature expected before the next scheduled oil change. Refer to
Table 1. Your authorized dealer has the proper oil to suit your requirements.
If it is necessary to add oil and Harley-Davidson oil is not available, use an oil certified for diesel engines. Acceptable diesel engine oil designations include: CF-4, CG-4, CH-4 and CI-4.
The preferred viscosities for the diesel engine oils in descending order are: 20W50, 15W40 and 10W40.
At the first opportunity, see an authorized dealer to change back to 100 percent Harley-Davidson oil.
Table 1. Recommended Engine Oils
H-D TYPE | VISCOSITY | H-D RATING | LOWEST AMBIENT TEMPERATURE | COLD WEATHER STARTS BELOW 50° F (10° C) |
|---|
H-D Multi-grade | SAE 10W40 | HD 360 | Below 4 °C (40 °F) | Excellent |
H-D Multi-grade | SAE 20W50 | HD 360 | Above 4 °C (40 °F) | Good |
H-D Regular Heavy | SAE 50 | HD 360 | Above 16 °C (60 °F) | Poor |
H-D Extra Heavy | SAE 60 | HD 360 | Above 27 °C (80 °F) | Poor |