Lead Replacement Additives

Lead replacement additives are essential for protecting classic and older petrol engines that were originally designed to run on leaded fuel, helping to prevent valve seat recession and maintain long-term engine health. This category features trusted aftermarket solutions such as Redex lead replacement additives, specifically formulated to replicate the protective properties once provided by leaded petrol. When used with unleaded fuel, these additives form a protective layer on valve seats, reducing wear, minimising overheating and supporting smooth combustion in classic engines. Ideal for vintage cars, heritage vehicles and older petrol-powered engines, lead replacement additives help preserve performance, reliability and originality without the need for costly engine modifications. Easy to dose and suitable for regular use, they integrate seamlessly into routine refuelling, making them a practical choice for both everyday classic car use and occasional driving. As an aftermarket car parts company, we supply proven lead replacement treatments that support engine longevity, smoother running and peace of mind for classic vehicle owners who want to protect their investment while continuing to enjoy modern unleaded petrol.