How often should the Mondeo spark plugs be replaced?
2 Answers
The Mondeo spark plugs should be replaced every 30,000 kilometers. Methods to determine if the spark plugs are damaged: Remove the spark plugs and observe them. The condition of the spark plugs can be judged based on their appearance and color. Normal spark plugs have insulator skirts and electrodes that appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has an insulator skirt that is reddish-brown, with an electrode gap between 0.8-0.9mm, and no signs of electrode burn. If the spark plugs are covered in oil or deposits but are not damaged, they can continue to be used after cleaning off the oil and deposits. If the spark plugs are severely damaged, with signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plugs with new ones. Additionally, if the spark plugs appear black as if smoked, it indicates that the wrong heat range was selected or that the air-fuel mixture is too rich, with oil seeping up.
I remember when I used to drive a Mondeo, the spark plugs were something that needed careful attention. They directly affect ignition efficiency. The official manual generally recommends replacing them every 30,000 to 60,000 kilometers, but it depends on the specific model and year. For example, my 2017 model's manual stated 40,000 kilometers. If you delay replacement for too long, carbon buildup or electrode wear on the spark plugs can cause slower engine starts, increased fuel consumption, and even severe engine shaking. Once, I procrastinated until 50,000 kilometers to replace them, and the acceleration felt sluggish—it smoothed out immediately after the replacement. For city driving with frequent starts and stops, it's advisable to check them earlier. If you drive mostly on highways, you can delay a bit. Just ask a reputable 4S shop for the correct model, and you can handle the replacement yourself. Don’t skimp on this small expense—it saves you from bigger engine troubles later. Materials like iridium spark plugs last longer, but avoid cheap off-brand ones. Sticking to the replacement schedule ensures both safety and cost-efficiency.
