Keeping your Harley-Davidson’s engine cool is a must for performance and longevity—especially in stop-and-go traffic, or going over mountain passes at higher speeds. With numerous oil cooling options available on the market, riders often opt for fan-assisted oil coolers. But are they really the best choice? We sat down with Bud Clarke, creator of the OilBud oil cooler, to get his insights on how his system compares, clears up misconceptions, and delivers real results.