Koyoto  10W-40 CI-4 uses severely refined synthetic technology base oils and a balanced additive system to deliver fuel economy performance and to protect modern engines operating under extreme conditions of pressures and temperatures. It’s the ideal choice for operators of heavy-duty truck and bus fleets equipped with latest designs, including those with regulatory emission-controlled systems like Diesel Particulate Filter (DPF) & suitable for longer oil drain intervals, as well as satisfying the needs of older engines. It may be used in naturally aspirated and turbocharged diesel and petrol engines, providing excellent protection even under the most severe conditions.