Harley-Davidson recommends using SAE 20W-50 motor oil in all Sportster models, including the 2006 Sportster. This oil weight is suitable for use in a wide range of temperatures, and it provides good protection for the engine's internal components.
Harley-Davidson Genuine Motor Oil
Harley-Davidson also recommends using its own brand of motor oil, Harley-Davidson Genuine Motor Oil. This oil is specifically formulated for use in Harley-Davidson motorcycles, and it meets or exceeds all of the manufacturer's specifications.
Other Acceptable Oils
In addition to SAE 20W-50 motor oil and Harley-Davidson Genuine Motor Oil, there are a number of other oils that are acceptable for use in a 2006 Sportster. These include:
* SAE 10W-40 motor oil
* SAE 15W-50 motor oil
* SAE 20W-40 motor oil
When choosing a motor oil for your 2006 Sportster, it is important to select an oil that is specifically designed for use in motorcycles. This will help to ensure that the oil provides adequate protection for the engine's internal components and that it does not cause any damage.