Engine oil is a major factor in the performance and service life of the engine. Use the proper grade of oil for the lowest temperature expected before the next oil change. Your authorized dealer has the proper oil to suit your requirements. Refer to Table 1.

Motorcycles are shipped from the factory with SCREAMIN' EAGLE SYN3 FULL SYNTHETIC MOTORCYCLE LUBRICANT 20W50. If SYN3 is not available and addition of motor oil is required, the first choice would be to add GENUINE HARLEY-DAVIDSON H-D 360 MOTORCYCLE OIL 20W50 to the SYN3 for engine lubrication. Although H-D 360 is compatible with SYN3, we suggest the mixture of the fluids be changed as soon as possible.

To switch lubricant to H-D 360, completely drain the SYN3 before filling with H-D 360. A residual amount of fluid will remain. It is not required to flush out the residual fluid.

If SYN3 or H-D 360 is not available, a third option is to add an acceptable diesel engine oil. Acceptable diesel engine oil designations include: CH-4, CI-4, and CJ-4. The preferred viscosities for diesel engine oils in descending order are: 20W50, 15W40, and 10W40.

While you may elect to use other oils not listed above, Harley-Davidson is not obligated to pay for damage resulting from the use of non-genuine oil or unapproved alternatives.

If using a mixture of oils, it is recommended to change to SYN3 or H-D 360, or approved alternatives at your first opportunity.