Should You Let Your Car Warm Up Before Driving It?

Power - by Joe Weber - updated on 11/18/2024

Winter can put a real strain on your vehicle. Cold temperatures cause engine fluids to thicken and slow down your battery's chemical reactions, making it harder to start your engine. We've already shared tips on preventing your battery from dying in the cold and stressed the importance of regular maintenance, but what about your daily routine?

Is warming up your car necessary in the cold? Does warming up your engine actually help? And should you keep your gas tank full during the winter?

Keep reading as we dive into these commonly asked winter driving questions and offer practical solutions.

How Long Should You Warm Up Your Car?

There's a lot of debate about how long you should warm up your car in winter, but with modern vehicles, the process is much quicker than you might think. The experts at AAA suggest   that for most cars, you only need about 30 seconds, the time it takes you to buckle your seatbelt, of idling before driving.

The engine warms up more efficiently while you're moving, so there's no need for prolonged idling, which wastes fuel and doesn't benefit your engine as much as driving does.

Should You Warm Up Your Car in the Winter?

The belief that you must let your car warm up for a long time stems from older cars that used carburetors, which required the engine to heat up enough to vaporize the fuel properly. Today's fuel-injected engines are much more efficient. They automatically adjust the air-fuel mix, making long idling unnecessary.

Modern engines warm up faster when you're driving, not sitting idle. So, there's no need to waste time (and gas) by letting your car sit running in cold weather—just start it, buckle up, and go!

Is Revving a Cold Engine Bad?

We often hear questions like, "Is revving your cold engine bad?" or "Can it damage your engine?" The answer is yes, revving while your engine is still cold can harm your engine. It doesn't help your car warm up faster, but instead puts extra stress on the engine before the oil has fully circulated. This can cause wear over time.

Likewise, avoid quick acceleration until your engine has reached its optimal temperature. You don't need to crawl along, but try not to floor the gas pedal immediately after starting your car.

What Does the Temperature Gauge Indicate?

The temperature gauge in your car monitors the coolant's temperature, giving you an indication of when your engine is warmed up. If your vehicle has a temperature gauge, you'll know the engine is fully warmed when the needle is positioned midway between the "C" (cold) and "H" (hot) markers. This tells you the engine has reached an optimal operating temperature, meaning it's safe to drive normally without putting unnecessary stress on the engine.

What Are Some Cold Weather Tips for Electric Vehicles?

Electric vehicles (EVs) are becoming more common on the roads, and they have unique considerations in cold weather. Consumer Reports suggests that cold temperatures can reduce an EV's battery range by up to 25%  . Here are some tips to optimize your EV's performance during winter:

• Precondition Your EV: While your vehicle is still plugged in, use the preconditioning feature to warm up the battery and cabin. This ensures the battery is at an optimal temperature before you start driving.
• Plan Your Routes: Be mindful of your vehicle's reduced range in cold weather and plan charging stops accordingly.
• Monitor Tire Pressure: Just like traditional vehicles, EVs can experience decreased tire pressure in cold weather, affecting range and traction.
• Use Eco Mode: Engage eco-driving modes to maximize efficiency.

What Routine Vehicle Winter Maintenance Should I Complete?

Regular vehicle maintenance is essential during the colder months to keep your vehicle running smoothly. Here are some key areas to focus on:

• Battery Check: Cold weather can diminish your battery's ability to hold a charge. Have your battery tested or test it yourself to ensure it's in good condition.
• Tire Care: Check your tire pressure regularly, as cold air can cause it to drop. Consider switching to winter tires for better traction on snow and ice.
• Fluid Levels: Ensure all fluids are at appropriate levels, including antifreeze, oil, and windshield washer fluid rated for low temperatures.
• Wiper Blades and Lights: Replace worn wiper blades and ensure all headlights and other lights are functioning properly for maximum visibility.
• Brakes: Have your brakes inspected to ensure they're responding correctly, as stopping distances can increase on slippery roads.

How Do I Prepare for a Winter Driving Emergency?

Winter weather can be unpredictable, so it's wise to prepare for emergencies. Keep an emergency kit in your vehicle that includes:

• Warm Clothing and Blankets: Extra layers can keep you warm if you're stranded.
• Flashlight and Batteries: For visibility if you break down at night.
• Jumper Cables: In case your battery dies. Jumper cables are a necessity all year round, not just in the winter.
• Ice Scraper and Snow Brush: To keep your windows clear.
• Non-Perishable Snacks and Water: Sustenance if you're waiting for help.
• First-Aid Kit: For minor injuries.
• Shovel and Traction Aids: A small shovel and sand or cat litter can help if you get stuck in snow.
• Emergency Kit: Keep the essentials together in one package with the Batteries Plus Roadside Emergency Kit.

Having these items on hand can make a significant difference in an emergency.

Should I Keep My Gas Tank Filled Up in Winter?

Experts advise keeping your gas tank at least half full during winter for several reasons. It helps prevent condensation in the tank, which can lead to fuel line freezing and also protects the fuel pump from overheating by ensuring it doesn't suck in air when the fuel is low.

Additionally, having enough gas is crucial if you get stranded in snow or ice, allowing you to run the heater and stay warm while waiting for help. Keeping your tank topped off can prevent unnecessary breakdowns and improve safety during winter driving.

Batteries Plus Has Everything You Need for Winter Driving

If you live in a cold-weather area, it's a good idea to have your battery tested at your local Batteries Plus store. We carry the best car and truck batteries, including AGM batteries, which are designed to perform better in cold conditions.

You'll also find essential winter items like battery chargers, replacement headlights, wiper blades, and more in our Automotive Center.

If you're storing a seasonal vehicle for the winter, Batteries Plus can help with maintenance tips, and if you're having trouble starting your vehicle, our associates can assist in diagnosing if it's your battery, starter, or alternator causing the issue.