An extra fuel tank for the Ford or Mazda Pick-up Truck 2012-Current. high strength steel extra fuel tank that fits above the spare wheel and the spare wheel drops by 65mm. The tank fills through the existing filler neck and gravity feeds into the main tank. The transfer pipe comes in at the 3/4 way mark on the main tank. The gauge of the vehicle will drop proportionately for the first 1/4 of the tank as it uses up the top part of the vehicles main tank and the whole of the extra tank. Once the gauge passes the 3/4 mark it is then using the main tanks fuel only.