1 Normal Spark Plug 🔻Light brown or gray color on the spark plug tip, indicating normal combustion and no problems. 2 High Fuel Consumption 🔻Clear blackness on the spark plug tip due to a rich fuel mixture or a clogged air filter. 3 Lean Air/Fuel Mixture 🔻Light-colored or white spark plug tip, may indicate a lean fuel mixture or air leak. 4 Excessive Additives 🔻Red or light brown deposits, often from poor fuel additives or anti-corrosion materials. 5 Bad Valve Stem Seals🔻Oil on the spark plug tip due to leaking valve seals. 6 Damaged Valve or Broken Piston Ring 🔻Wear or damage on the spark plug tip with abnormal deposits. 7 Prolonged Engine Operation with Knocking or Low Octane Fuel 🔻Signs of irregular combustion or pre-ignition. 8 Oil Burning 🔻Thick oily deposits due to engine oil consumption or worn rings. Greetings to all.. 💐