Alexi
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Harley Davidson Oil and the Low Quality of OEM Oils Harley Davidson Oil and The Low Quality of OEM Oils.In the more severe 4-Ball Parameter 3 test the Harley Davidson Screamin Eagle Syn3 leaves a wear scar of 0.70 mm and the AMSOIL 20W-50 Synthetic Motorcycle Oil leaves a wear scar of 0.39 mm. This data indicates that the Harley Davidson oil leaves a wear scar 79% higher than the AMSOIL motorcycle oil.
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