Spark plugs, despite their small size, are crucial for a car's engine performance, igniting the fuel-air mixture and affecting fuel economy. Mechanics emphasize their importance, noting that many motorists overlook them until engine issues arise.

• According to Nairobi mechanic Julius Mwangagi, spark plugs are often the culprit when cars misfire, highlighting their critical role in vehicle operation.
• There are various types of spark plugs, including copper, platinum, double platinum, iridium, and silver, each suited for different engine types and offering varying lifespans and performance benefits, from 3,000 kilometers for copper to up to 200,000 kilometers for iridium.
• Engineers recommend selecting the correct plug type for optimal performance; downgrading can lead to issues like misfires and poor acceleration, while upgrading, especially to iridium, can improve reliability and fuel efficiency.