Volkswagen Lupo 1998 1.4 petrol service and maintenance
Engine oil
Engine oil capacity: 3.2 litres (3.4 quarts)
Recommended oil type (Oil Viscosity Classification SAE) is 5W-30
Timing belt
Manufacturers recommended timing belt replacement interval for Volkswagen Lupo 1.4 petrol is 90,000 km.
Based on practical experience, recommended Volkswagen Lupo 1998 1.4 16V 75 Hp Automatic timing belt change interval is 40,000 km when belt should be replaced, or at least periodically check the belt's condition after this mileage and replace it at the first sign of damage.
Running your car in aggressive environments (e.g. salt, sand, etc.) causes timing belt to degrade faster and reduces its lifespan; under such conditions, the belt may need to be replaced sooner.

Volkswagen Lupo 1998 1.4 16V 75 Hp Automatic 1998 - 2005 Volkswagen Lupo 1998 technical data
Volkswagen Lupo 1998 owner reviews
Always consult your vehicle manufacturer's service manual for service intervals and specifications!