STP Diesel Treatment Bundle: Injector Cleaner 200ml Ultra 5-in-1 System Cleaner 400ml

The STP diesel treatment bundle is £10.86 at Amazon. It contains STP Diesel Injector Cleaner (200ml) and STP Ultra 5-in-1 Diesel System Cleaner (400ml).
STP says the Diesel Injector Cleaner clears dirty injectors in just one treatment, while the Ultra 5-in-1 System Cleaner is its most advanced diesel formula, helping to remove deposits around the fuel system.
STP also says a cleaner engine may mean lower exhaust emissions and better fuel consumption. Both are simply added to the fuel tank, so they are an easy bit of maintenance before an MOT or a long winter journey.
It is rated 4.6 out of 5 from nearly 500 ratings on Amazon and was in stock at the time of posting. Please check the instructions on each bottle for the right dose for your tank. Sold by Amazon. Free delivery for Prime members or on qualifying orders.