we bring our Kias in every spring and fall...it coincides with the tire swaps...we don't really put a ton of kms on our vehicles anyway, so the roughly 6 month gaps are fine...we're usually in the ~8k kms, which the dealership said was fine...i get free oil changes anyway, so it's not like i'm out anything, i would just prefer to not waste the oil when it is still good for a bit longer (and reduce the number of dealership visits, for convenience).