Hopefully y'all managed to stack enough fuel into your tanks for the Long Weekend, however, if you think you'll be a bit short, but can't buy in bulk, I found the deal for you.
After doing a full market scan, this is the best I found for Petrol, but if you are using Diesel, I'd just look for the closest NPD or Pak'nSave, because they are significantly cheaper!
NPD is $2.676 at most Christchurch store I think