  In neutrino oscillation experiments, neutrino interactions at the detector
are simulated using event generators which attempt to reflect our understanding
of nuclear physics. We study the impact of different neutrino interactions and
nuclear models on the determination of neutrino oscillation parameters. We use
two independent neutrino event generators, GENIE and GiBUU, and apply them to a
setup with a conventional neutrino beam aiming at a water \v{C}erenkov
detector, for which only the QE-like sample is selected. Subsequently, we
perform a fit to the oscillation parameters in the $\nu_\mu$ disappearance
channel.
