STP Complete Petrol Fuel System Cleaner – 400ml (50400EN)

Description

Genuine STP · Part no. 50400EN

Safety: Danger. Causes serious eye irritation. May be fatal if swallowed and enters airways. Toxic to aquatic life with long lasting effects. Repeated exposure may cause skin dryness or cracking. Read the label before use.

The STP Complete Petrol Fuel System Cleaner is a 400ml treatment for petrol engines, working on injectors, carburettors, intake valves and ports, combustion chambers and piston tops in one go. With the highest detergent level of any STP formula, it suits a petrol car that knocks or pings, starts poorly or feels sluggish.

Good to know

• Does it suit carburettor engines? Yes, STP lists carburettors along with injectors and intake valves, so it suits older carburettor cars as well as injected engines.
• What does knocking or pinking tell me? A metallic rattle under load can come from carbon build-up, which this cleaner targets; if it carries on, check you are using the octane the handbook asks for.
• How should I drive after adding it? Follow the label, which usually means pouring it in just before filling the tank, then use the tankful normally; a good run on faster roads helps the treated fuel work through.

Which one?

For a lighter regular treatment, the STP Petrol Treatment – 200ml (51200EN) also keeps carburettors and injectors clean; Comma Petrol Magic – 400ml (PEM400M) is aimed at stalling and hesitation. Neither is on our site yet.

Key features

• 400ml complete petrol fuel system cleaner
• Cleans injectors, carburettors, intake valves and ports
• Works on combustion chambers and piston tops
• STP's highest detergent level
• Helps with hard starts, knocking and pinging

Specification