Penrite Convoy Mono Truck 40 Engine Oil - For older and classic diesel engines Penrite Convoy Mono Truck 40 is a Monograde SAE 40 engine oil for older and Classic engines formulated with high quality Mineral base oil and modern additives to provide outstanding protection in Diesel and petrol engines against wear, corrosion, oil oxidation and sludge. Need an engine oil for your truck, bus or other heavy equipment? Penrite Convoy is a range of heavy-duty fully synthetic engine oil and premium mineral engine oil for new and older model engines. From humble begginings in Melbourne, Australia in the 1920s, Penrite are one of the most recognisable lubrications suppliers and remain to be Australian made and owned to this day. With a wealth of lubrication solutions to suit all types of car, truck, bike and various other machinery, Penrite have the fluids to get your vehicle running smoothly, reliably and cleanly. Penrite oils have been tested, refined and perfected with lab testing and real-world circumstances which sees their oils pushed to their absolute limits all with the goal to look after your engine. Penrite also offer a range of gear oils, transmission fluids, engine additives and so much more.