Nigeria’s petroleum marketers have accused Dangote Refinery of operating a secret petrol price regime. The president of the Petroleum Products Retail Outlets Association of Nigeria, PETROAN, Billy Gillis-Harris, disclosed this on Thursday during an interview with Channels Television. His comment comes amid the latest hike in the pump price of petrol by the Nigerian National Petroleum Company Limited to N1,030 per litre in Abuja. Reacting to the hike and way forward for petrol marketers and Nigerians, Gillis-Harry asked Dangote Refinery to stop operating in secrecy regarding the pricing of petr…