STP Complete Fuel System Cleaner – Petrol 400mlSTP Complete Fuel System Cleaner Petrol is designed to clean and protect the entire fuel system for restored performance. With just one bottle, this petrol fuel system cleaner will help remove deposits from injectors, valves and combustion chamber, prevent hesitation, corrosion, and reduce emissions.Restores your cars performanceReduces emissionsPrevents hard starts and engine hesitationSaves fuelUsage Instructions:Simply add entire bottle into a full tank (treats 50-60L) every 4,000 miles / 6,400kms.Usage Frequency: Use every 4,000 miles / 6,400kms