09-1. CAPACITIES, FLUIDS, LUBRICANTS AND SEALANTS. Capacities. The following capacities are only an approximation of the amount of fluid required to fill the respective system. Capacities - UK \ EURO \ ROW. Capacities - NAS. Refrigerant - A/C system. Component. Metric Units. Fuel tank. 95 litres. Engine - Td5: ⇒ Engine oil and filter change 1991. 18.1 Avg MPG. 4 Vehicles. 511 Fuel-ups. 50,950 Miles Tracked. View All 1991 Land Rover Discoverys. The most accurate Land Rover Discovery MPG estimates based on real world results of 11.3 million miles driven in 844 Land Rover Discove1ies. wDxw1kn.