The 250 ML LEAD SUBSTITUTE is designed to enhance the performance of classic car engines that originally required leaded fuel. This additive lubricates valve seats and protects against wear while promoting smooth combustion in older vehicles. Ideal for classic car enthusiasts seeking an eco-friendly alternative to leaded fuels. Easy to use, simply add it to the fuel tank before refueling. Our lead substitute extends the life of your engine and ensures optimal performance even with unleaded fuel. The 250 ml bottle is sufficient for multiple fill-ups, depending on the fuel tank size.