Honda NSS250 2007 Owner's Manual page 193

Specifications
Fuel & Lubricants
fuel
recommendation
fuel tank capacity
engine oil capacity
engine oil
recommendation
cooling system,
recommendation
cooling system,
capacity
184
Technical Information
unleaded gasoline, pump octane number of 86 or higher
3.17 US gal (12.0 )
after disassembly:
after draining: 1.2 US qt (1.1 )
API Service Classification SG or higher except oils
labeled as energy conserving on the circular API service
label, SAE 10W-30, JASO T 903 standard MA,
Pro Honda GN4 4-stroke oil (USA & Canada) or Honda 4-
stroke oil (Canada only), or an equivalent motorcycle oil
Pro Honda HP Coolant or an equivalent high quality ethylene
glycol antifreeze containing corrosion protection inhibitors
specifically recommended for use in aluminum engines
1.3 US qt (1.2 )
including reserve
1.4 US qt (1.3 )