Select your Harley-Davidson engine family to get the exact engine oil type and capacity – plus the primary chaincase and transmission fluid capacities most owners forget to check. All figures are drawn from Harley-Davidson service manuals. Free, no signup required.
Harley-Davidson Oil & Fluid Capacity Lookup
Get the exact engine oil type and capacity for your Harley engine family - plus the primary chaincase and transmission fluid capacities that most owners forget to check. All figures are from Harley-Davidson service manuals.
Why your Harley has three separate fluids
Most Harley-Davidson Big Twins (Twin Cam, Milwaukee-8, Evolution) use three separate lubricants: engine oil, primary chaincase lubricant, and transmission fluid – each with its own capacity and change interval. Sportster Evolution models share one cavity for the primary and transmission. The tool above breaks down exactly what your engine family needs so you do not overfill or mix them up.
Always verify before you fill
These are nominal refill capacities. Capacities vary slightly by sub-model and year, so always confirm on the dipstick or sight glass and against your owner’s manual before adding fluid. Not sure which engine family you have? Use our free Harley VIN Decoder first. See also: best 20W-50 oil for Harley.