To provide a gas turbine fuel oil slight in metallic impurities(ash), sulfur impurities, soot generation and particulate impurities, suppressing gas turbine blade corrosion, having high calorific value, suitable for gas turbines of thin preevaporation and premixing combustion system, and slight in carbon deposition in thin preevaporation and premixing tubes.

The gas turbine fuel oil meets the following properties: (a) density(at 15°C) is ≥0.890 g/cm3, (b) dynamic viscosity(at 50°C) is 1.00-3.50 mm2/s, (c) 90vol% distillation temperature is ≤335°C, (d) 95vol% distillation temperature is ≤355°C, (e) 97vol% distillation temperature is ≤365°C, (f) distillation endpoint is ≤370°C, (g) 10% residual carbon content is lower than 0.20 mass%, (h) ash content is ≤0.001 mass%, (i) genuine calorific value is ≥37,670 kJ/L, (j) sulfur content is ≤0.30 mass%, (k) cloud point is ≤0°C, (l) vanadium content is ≤0.1 mass ppm, (m) a total of sodium content and potassium content is 0.2 mass ppm, and (n) particulate impurities content is ≤10.0 mg/L.