Specially designed for Harley V-Twin engines. Meets and exceeds all API CI-4/SL ratings and meets all warranty requirements. TPI can sell any oil we want. We choose to offer Drag because of its extreme quality.
DO NOT FORGET TRANSMISSION AND PRIMARY OIL: So many riders do not change their transmission and primary oils on a
regular schedule. You must change these oils after the first 1000 miles
and at least every 10,000 miles after that. The transmission and
primary oils collect gear and chain particles and can ruin gears and
bearings if not serviced regularly.