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The recommended coolant for the 2006 Jeep Liberty is Zerex Yellow 50/50. If the engine is experiencing issues, it could be due to a loose gasket that needs immediate tightening. Don't ignore oil leaks as they should be addressed promptly. Keep an eye out for a spark plug coming loose, as it could lead to engine problems. Overheating is a serious concern that can result in vehicle fires and explosions. Watch out for excessive oil consumption and change the oil as needed. Remember to replace the air filter every 15,000 to 30,000 miles, change the coolant every 60,000 miles, and swap out spark plugs every 100,000 miles, unless it's a copper one, in which case it should be changed every 30,000 miles.
The 2006 Jeep Liberty uses Prestone 50/50 pre-mixed extended life antifreeze/coolant in a 1-gallon container.