Lead Replacement Additive
A lead replacement additive is a fuel additive for older engines designed for leaded petrol, helping protect valve seats.
What is Lead Replacement Additive?
Leaded petrol was phased out in Europe around 2000. Engines with hardened valve seats do not need it. It is added to the tank at each fill-up. Many classic owners fit hardened valve seats during a cylinder head rebuild.
How it works
The additive forms a protective film on the valve seats in place of the lead.
Why it matters for your car
Use the dose stated on the bottle. Check whether your engine was converted for unleaded petrol.
Other terms
- Approach Angle
- Battery Terminal And Clamp
- Boot Capacity (Cargo Volume)
- Clear Coat Failure (Lacquer Peel)
- DPF Regeneration
- Engine Oil
- Engine Stalling
- Miller Cycle
- Misfire Counter
- Rotary Engine (Wankel Engine)
- Steering Wheel Lock
- Telematics Control Unit
- Three-Phase AC Charging
- Throttle Position Sensor (TPS)
- Transmission Jack
- Turning Circle
- Vehicle Tax (Road Tax)
- Voltage Drop Test
- Warning Triangle
- Wheel Alignment