Do Car Engines Get Worse Mileage in the Cold?

Yes, car engines do get worse mileage in the cold.

There are a few reasons for this:

• Cold air is denser than warm air. This means that there is more oxygen in a given volume of cold air, which makes the engine run richer (with a higher air-to-fuel ratio). This richer mixture burns less efficiently, resulting in worse mileage.
• Cold oil is thicker than warm oil. This makes it harder for the oil to circulate through the engine, which can lead to increased friction and wear. Friction and wear can both reduce engine efficiency, resulting in worse mileage.
• Cold batteries are less efficient than warm batteries. This means that the battery has to work harder to start the engine, which can put a strain on the electrical system and reduce mileage.

How much worse does mileage get in the cold?

The amount that mileage gets worse in the cold depends on a number of factors, including the outside temperature, the type of engine, and the condition of the engine. However, as a general rule of thumb, mileage can decrease by 10-20% in the cold. This means that if you normally get 30 mpg in the summer, you can expect to get 27-28 mpg in the winter.

What can you do to improve mileage in the cold?

There are a few things you can do to improve mileage in the cold:

• Let your engine warm up before driving. This will help to thin the oil and reduce friction.
• Avoid idling your car for long periods of time. Idling wastes gas and can actually make mileage worse.
• Drive at a moderate speed. Driving at high speeds can increase drag and reduce mileage.
• Use a block heater. A block heater is a device that plugs into your car’s engine and helps to keep it warm overnight. This can help to improve mileage by reducing the amount of time it takes for the engine to warm up.
• Get regular tune-ups. A tune-up can help to ensure that your engine is running at its best, which can improve mileage.

Conclusion

Car engines do get worse mileage in the cold. However, there are a few things you can do to improve mileage in the cold. By following these tips, you can help to keep your car running efficiently and save money on gas.