Holes drilled in petrol tanks cost the victim the price of petrol and also a replacement tank which can cost upward of $1000. A woman who had her car drained of diesel said the theft cost over $1000, three weeks without a car and a full tank of fuel. Rotorua woman Helen Weblin had been on a day tramping near Taupo when she returned to her SUV-style car and was met with the smell of diesel.