The major difference between coolants used in some Chrysler vehicles and other cars is the presence of a so-called "hybrid" mixture of inorganic and organic anti-corrosion chemicals. Many car makers design their vehicle coolant systems to use either inorganic or organic anti-corrosion chemicals exclusively, rather than a mixture of the two. However, not all Chrysler vehicles or those sold under subsidiary brands such as Dodge and Jeep use hybrid coolants, and hybrid formulations are not always the same between models.
Car coolants traditionally used inorganic chemicals to help provide corrosion resistance to the cooling systems of vehicles. However, anti-freezes using organic acid compounds to prevent corrosion came into use during the 1990s due to the potential for very long periods of corrosion protection on the order of 100,000 miles when using these chemicals. Many automakers, including Chrysler, opted to use hybrid coolant approaches with a mix of traditional inorganic and organic acid corrosion inhibitors in many of their vehicles built from the late 1990s onward, such as the Dodge Intrepid and Chrysler 300M sold in 1998 and 1999.
Despite similarities in the underlying technology, different manufacturers have opted for different blends of organic and inorganic corrosion inhibitors in their vehicles. Therefore, the anti-freeze that is appropriate for one manufacturer's vehicles is often not suitable for use in cars made by a different manufacturer. This situation is complicated in the case of Chrysler vehicles, as many Chrysler cars are heavily based on cars produced by foreign manufacturers such as Mitsubishi and Mercedes-Benz. Owners should make sure that they select the correct coolant for their specific vehicle, as generic coolants intended for most Chrysler cars may not have the correct formula for a specific car.