Total Quartz 5000 15W/40. 5 litres Multigrade oil Mineral for Petrol & Diesel engines in passenger vehicles. Suitable for a very wide range of multi-valved or turbocharged Petrol & Diesel engines. Quartz 5000 15W/40 is an oil that prolongs engine life, provides enhanced protection in all conditions & protects catalytic converters while helping to reduce emissions.