Motorcycle Maintenance and Oil Information for 2017 Suzuki Boulevard S40 650
If you are planning an oil change on the 2017 Suzuki Boulevard S40 650, start by checking the manufacturer’s full lubricant specification and the correct refill procedure. The matched oil information below can help you narrow the choices without substituting for the service manual.
What kind of engine oil does a 2017 Suzuki Boulevard S40 650 need?
For the engine-oil application, the database lists 10W-40, 20W-50. The matching product listing includes 10W-40 Synthetic Metric Motorcycle Oil, 20W-50 Synthetic V-Twin Motorcycle Oil. Viscosity alone does not establish full compatibility; verify the manufacturer’s oil standard.

