Mate, it depends on how hard you ride, I was GN4, ride hard and change every 750km, the oil still looks ok when it comes out, but its cheap insurance to stop engine failure. Always make sure you do the oil and filter at the same time. Dont do one with out the other, the 700xx runs a very small oil filter compared to a Raptor.
HMF Bill Ballance full system with HMF controller, Pro design Filter and billet adaptor,
Fox Evolve Gen 2 with Houser +.75 arms,
Fox Podiums with Shock Pro skull covers,
OMF re-enforced front and rear with Kenda XCF up front and of course Kenda Kutter's on the rear,
Trail Tec bars, clamps and dash.
Braided lines and billet clamps,
Moto Active nerfs and Bumper,
OZlink gets his Kutters from me