Hi-Tec Oil Heavy Duty Diesel Engine Coolant Premix is a heavy duty diesel engine coolant premix, luminescent red in colour, superior, fully formulated Hybrid technology engine coolant. This Hybrid technology coolant has the advantage of being more robust than both conventional and organic acid technology (OAT) engine coolants. This low silicate, phosphate and amine free product is recommended for use in automotive (aluminium compatible), light duty and heavy-duty diesel applications namely on-road truck, off-road, farm and marine. It provides excellent high temperature aluminium protection. Extended life 6 years, 12,000 hours or 1,000,000 km whichever comes first. Available in; 20lt, 200lt, 1000lt IBC.