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For the 2003 Dodge Caravan, it is recommended to use at least a 50% solution of Mopar Antifreeze 5 Year/100,000 mile Formula HOAT or a similar type of antifreeze. If the temperature drops below 34°F or 37°C, it is advisable to use a higher concentration. The van's antifreeze capacity is 11.35 quarts, which helps regulate the engine in very cold weather. The price for antifreeze can range from $11 to $16 per gallon depending on where you purchase it. Having a mechanic change the antifreeze can cost between $100 to $120 for labor and the parts. The process can be completed in 10 to 15 minutes, based on your level of experience.
For the 2003 Dodge Caravan, it is suggested to use Mopar antifreeze/coolant that is good for 5 years or up to 100,000 miles.