Harley-Davidson Mineral Oil Service
Complete drivetrain fluid service using premium mineral lubricants — commonly referred to in Harley-Davidson culture and mechanic circles as a '3-hole service' (or three-hole service). This comprehensive service drains and replaces all three distinct powertrain fluids: engine crankcase oil, primary chaincase fluid, and transmission gear lubricant, paired with a brand-new spin-on oil filter and fresh drain plug O-rings.