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 'DPF' Diesel Particular Filter Cleaner - 400ml from £9.45 LPG Fuel System Treatment - 1 Litre £11.90 Sold out SILVERHOOK Lead Replacement Substitute - 325ml from £6.76 SILVERHOOK Diesel Particular Filter Treatment Cleaner - DPF - 325ml (12 Pack) £79.95 POLYGARD - Super DOT 4 Brake & Clutch Fluid PREMIUM Synthetic - 5L from £23.58