2007-2010 Kawasaki Ultra 250X/260X/260LX PWC Factory Service Manual, Page 172Get this manual
4-8 ENGINE LUBRICATION SYSTEM Specifications
Item Engine Oil
Grade Viscosity Capacity Level API SG, SH, SJ, SL or SM with JASO MA, MA or MA2 SAE 10W-40 4.0 (4.2 US qt, with or without the filter) S.O (S.3 US qt, when engine is completely dry) Between upper and lower level lines (see text) 461 kPa (4.7 kgfcm67 psi)