Penrite Diesel Biocide Fuel Treatment (2 Sizes Available) Lok On Less soot build up in Size:No.0 X 75mm Less soot build up in oils can result in reduced maintenance and potentially longer drain intervals Its strong and durable construction makes even the toughest tasks easier This offers additional protection and advantages for vehicles that are stored for long periods of time TREATMENT DOSAGE RATE Normal Use 1 Litre to 2000 Litres Fuel (25ml per 50 Litres) Blocked Injectors or Fuel System 1 Litre per 500 Litres (100ml per 50 Litres) Bacterial Growth (Shock Treatment) 1 Litre per 250 Litres (200ml per 50 Litres) Please Note: If your vehicle is fitted with a Capless Fuel Filler system