STP GST77400EN Car Care Ultra System Cleaner, 5 in 1 Concentrated Cleaning Formula for Diesel Engines 400 ml £10.61 Prime / £15.10 Non Prime

Almost the lowest price it's ever been according to the three camels.

• Saves fuel
  
  
• Restores power & performance
  
  
• Reduces emissions
  
  
• Protection of key engine parts from wear and corrosion
  
  
• For capless fuel tanks please use manufacturer supplied funnel to pour in STP additive

5-in-1:
Preventative Keep Clean
Injector Clean Up
Fuel System Clean Up
Cetane Improver
STP Wearguard/Anti-wear