Caterpillar Forklift trucks, gas/LPG/petrol GP18 Mitsubishi 4G63 (1993-1999)

Which oil should you use for your Caterpillar Forklift trucks, gas/LPG/petrol GP18 Mitsubishi 4G63 (1993-1999)? Complete advice for all components, such as the engine, gearbox (transaxle), brake system, power steering system and cooling system.