Until the 1980s, gasoline fuels contained lead to prevent “engine knock.” A pleasant side effect of these lead additives was the protective effect on valves and valve seats. Even though most old cars today run smoothly without lead in the gasoline, there are some engines, especially sports engines, that require the addition of lead. Please contact the manufacturer or your specialist workshop for information. Dosage 1: 1000. Example 20 ml for 20 L fuel.
