If you plan to do a lot of towing and your vehicle is not already equipped with coolers, consider having them added. Aftermarket engine oil and transmission fluid coolers are simple, low-cost add-ons that operate on the same principle as your car's radiator. The fluid flows through them, and many small fins absorb and dissipate heat. Cooler operating temperatures of engine oil and transmission fluid can add significantly to the life of your engine and transmission.

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