Honda PIONEER SXS1000 2016 Owner's Manual page 144

Engine Oil & Filters
6. If required, remove the rear mudguard lid (page 129) and oil fill
cap, and then add the specified oil into the fill cap hole, up to the
upper level mark on the dipstick. Do not overfill.
7. Reinstall the oil fill cap and dipstick, and then install the rear
mudguard lid.
8. Lower the cargo bed.
NOTICE
Running the engine with an improper oil level can cause serious
engine damage.
UNDER CARGO BED
CENTER
(SXS1000M3/M3P)
140
Servicing Your Honda
oil fill cap
(SXS1000M5P/M5D)
oil fill cap