Skip to content Toggle navigation AMSOIL vs. Harley-Davidson Oil: How We Perform John Baker | Mar 12, 2020 11:04 AM Bikers always want to know how AMSOIL products compare to the competition, particularly against Harley-Davidson oil. It’s no wonder since Harley-Davidson dominates two-wheeled culture despite the resurgence of the Indian brand and the rising popularity of adventure bikes and everything you can do with them . The company’s founding is a great story. William Harley and Arthur Davidson built their first motorcycle in a 10×15 shed right here in our home state of Wisconsin. While the duo’s 116-cc prototype bike lacked the power to ascend the hills around Milwaukee, it turns out it had the power to reshape American culture. That’s one reason several AMSOIL employees ride Harleys. But, what about Harley-Davidson motorcycle oil? To see how AMSOIL Synthetic V-Twin Motorcycle Oil performs vs. Harley-Davidson oil, check out the performan