Spark plug failure due to a combination of strong magnetic fields and undesirable fuel additives

Abstract

• Spark plugs designed for optimal durability failed after 100 h of operation. • The insulator was covered with a deposit consisting of iron oxides and soot. • The strong magnetic field deposits metal ions on the insulator. • Organometallic anti-knocking agents in low-grade fuel acerbate the effect. • Government action imposing compliance with fuel composition norms is essential