Influence of Octane Number on the Four-Stroke Petrol Engine Performance

This study aims to determine the effect of octane number on the characteristics of a 4-stroke gasoline engine. This study tested 3 types of fuel with octane values RON 90, 92 and 98. The results of this study generally indicate that the higher the octane number of fuel oil will increase the engine performance value. The average engine torque value increased by 13.2% with RON 92 fuel and 38.15% using RON 98. The engine power value increased by 13.1% with RON 92 and 17.8% with RON = 98. The engine specific fuel consumption value decreased by 9.5% with RON 92 and decreased by 22% with RON 98.