The invention provides a double-oil-tank
oil supply system. The double-oil-tank
oil supply system comprises a first
oil tank, a second
oil tank, a
fuel conversion valve and a heating device; the gradeof diesel oil in the first
oil tank is higher than the grade of diesel oil in the second oil tank; the heating device is used for heating the oil in the first oil tank; when a vehicle is cold startedin a cold region, the
fuel conversion valve controls a fuel pipeline of the second oil tank to communicate with an engine oil way, and the heating device starts to heat the oil in the first oil tank;and after the temperature of the oil in the first oil tank is increased to reach a set
oil temperature, the
fuel conversion valve controls a fuel pipeline of the second oil tank to
cut off from the engine oil way, and the fuel conversion valve controls communication between the fuel pipeline of the first oil tank and the engine oil way. The double-oil-tank
oil supply system can guarantee normal
cold start of the vehicle in the cold region, meanwhile, needs no mode of baking the oil tanks by fire to heat the oil, prevents the time and vigor wastes, improves the safety, and saves more costs.