The Ultimate Guide to Choosing the Right Coolant Type for Your 2010 Ford Fusion

By Nick Marchenko, PhD

The 2010 Ford Fusion Hybrid is equipped with two separate coolant systems: one for the engine and another for various electric motors and components specific to the hybrid system. It's vital to maintain both systems to keep your Fusion running at its best.

Checking Engine Coolant

Regular checks are necessary. The coolant concentration should be a 50/50 mix of coolant and distilled water, ensuring a freeze point of -34°F (-36°C). Use a hydrometer or antifreeze tester for accurate concentration testing. The coolant level should be within the COLD FILL RANGE in the coolant reservoir.

Motor/Electronics (M/E) Coolant

Located at the rear of the engine compartment, the M/E coolant system operates similarly but at a lower temperature and pressure. Its level should also be maintained at the FULL COLD level.

Factory Fill and Coolant Specifications

Your Fusion was factory-filled with a 50/50 engine coolant and water concentration. This ratio provides freeze protection down to -34°F (-36°C) and boiling protection up to 265°F (129°C), along with rust and corrosion protection.

Adding Engine Coolant

When adding coolant, ensure it’s a 50/50 mixture of engine coolant and distilled water. Add this to the coolant reservoir when the engine is cool, until the fill level is appropriate. Warning: Never add coolant to a hot engine.

What Not to Do

• Do not mix different colors or types of coolant.
• Avoid using stop leak pellets or cooling system sealants.
• In emergencies, you can add water, but replace it with a proper coolant mixture as soon as possible.
• Never use alcohol, methanol, brine, or any coolant mixed with alcohol or methanol antifreeze.
• Do not add extra inhibitors or additives to the coolant.

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For Severe Climates

In extremely cold climates (below -34°F), you might need to increase the coolant concentration above 50%, but never above 60%. In hot climates, maintain the concentration above 40%.

Recycled Engine Coolant

Currently, Ford does not recommend using recycled engine coolant due to the absence of an approved recycling process.

Coolant Capacity

The engine coolant capacity for the 2010 Fusion Hybrid is 9.3 quarts. Use Motorcraft Specialty Green Engine Coolant (VC-10-A2).

Final Thoughts

Taking care of your Ford Fusion’s cooling system isn't just about adding the right coolant. It's about understanding the unique needs of your vehicle, especially if it's a hybrid like mine. Regular checks, using the right mixture, and avoiding harmful substances are key to keeping your Fusion running smoothly.

Remember, your vehicle is more than just a mode of transportation; it's a companion on your life's journeys. Treat it well, and it will do the same for you!

Nick Marchenko, PhD

Industrial Engineer & Automotive Content Specialist

Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.

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