A total of 28 incidents of misfueling were reported from October 2018 until September 2019.
Information obtained under the Official Information Act found Wellington police were the worst offenders, with six instances.
Central police officers weren't far behind with five incidents.
Read more:https://www.stuff.co.nz/national/117166694/police-put-wrong-fuel-in-vehicles-28-times-in-one-year