Honda FourTrax Rubicon TRX520FA5 2020 Owner's Manual page 288

Quick Reference
Scheduled
Maintenance
Pre-ride
Inspection
Fuel/Capacity
Engine Oil/
Capacity
Maximum
Weight Capacity
Quick Reference
Initial: 100 miles (150 km)
Regular: every 600 miles (1,000 km)
Check the following items each time
before you ride (page 67): engine oil,
radiator coolant, fuel, tires, drivetrain
boots, guards, nuts & bolts, underbody &
exhaust system, air cleaner housing drain
tube, leaks, loose parts, cables, lights,
throttle, brakes, switches, steering.
unleaded gasoline, pump octane number
86 or higher
3.88 US gal (14.7 ℓ)
reserve:
1.29 US gal (4.9 ℓ)
API Service Classification SG or higher
except oils labeled as energy conserving
or resource conserving on the circular API
service label, SAE 10W-30, JASO T 903
standard MA, Pro Honda GN4 4-stroke oil
or equivalent
after draining:
3.8 US qt (3.6 ℓ)
after draining & oil filter change:
4.0 US qt (3.8 ℓ)
573 lb (260 kg)
rider, all cargo and accessories