Image 1 of 1 STP Engine Flush (Petrol & Diesel) - 450ml £6.95 Quantity: Add To Cart Added! Suitable for petrol and diesel engines.Add directly to used motor oil before each oil change.Removes harmful sludge and deposits.Contains an anti-wear additive to help protect engine surfaces. Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More You Might Also Like SILVERHOOK Automatic Transmission & Power Steering Stop Leak - 350ml from £4.75 STP Diesel Injector Cleaner - 200ml £8.55 SILVERHOOK Octane Booster (High Performance) - 325ml from £5.65 SAS Engine Flush - 300ml from £6.80 SILVERHOOK 'DPF' Diesel Particular Filter Cleaner - 325ml from £7.50