The National Petroleum Authority (NPA) has announced increases in the ex-pump prices of premium and diesel, but reduced the prices of premix fuel.Professor Ivan Addae-Mensah, Chairman of the NPA, said premium petrol would now sell at 32,000cedis per gallon. Diesel is up to 29,000 cedis a gallon.. Premix fuel goes down to 20,000. LPG, Kerosene, Aviation fuel remained the same.