Is Warming up the Car Before Driving Necessary? Advantages, Disadvantages, and More

Reviewed by

Anthony Harlin, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on June 21st, 2024

Reading Time: 4 minutes
Summary
  • Warming up the engine before departing might feel necessary, but it isn’t always the case. The ideal idle time to warm your car up should be the time it takes you to put on your seatbelt.
  • Keeping your engine turned on for excessive periods to warm it will lead to pollution, wasted fuel, and unnecessary engine wear.
  • Overall, warming up your vehicle does more harm than good. You should only warm your vehicle to clear snow during winter.

Warming up the car before driving was a necessity back in the early days of motor vehicles. It was a practice meant to prevent stalling by waiting until the proper air-fuel ratio in the engine is achieved.

Some drivers still have a habit of warming up their vehicles, but is there still a need for it considering the advances in automotive technology?

Is It Necessary to Warm Up Your Car Before Driving?

Warming up the car before driving has its advantages and disadvantages. However, it’s not by all means necessary. Some people opt to do it to warm the cabin during the winter season. But there’s an argument to be made that the disadvantages outweigh the advantages.

Warming up the car before driving has its advantages and disadvantages. However, it’s not by all means necessary.

Disadvantages of Warming Up the Car Before Driving

Warming up your vehicle may affect its overall performance. At times, it could even shorten its lifespan. While the damage may not show immediately, it starts accumulating the more you idle.

Poor Fuel Consumption

According to reports from the U.S. Department of Energy, idling consumes one-quarter to one-half a gallon of fuel every hour you idle. This leads to poor fuel consumption and expenses that accumulate every year.

Pollution

Idling is not only bad for fuel consumption, but it also contributes to pollution due to harmful vehicle emissions. According to studies, one minute of idling produces more carbon monoxide than smoke from three packs of cigarettes.

Due to this, some states have implemented programs that reduce idling for school buses. It doesn’t help that warming up your vehicle produces carbon dioxide, a gas that contributes to climate change.

Engine Wear

Warming up or idling for prolonged periods takes a toll on your engine, as it’s working when it shouldn’t. This accelerates wear and tear, which could lead to damaged cylinders, spark plugs, and emissions systems.

Some manufacturers even took it upon themselves to install automatic stop-and-start technology to prolong the lifespan of the engine and the vehicle itself.

Advantages of Warming up the Car Before Driving

Of course, warming up your car also has its advantages, especially during certain seasons.

Clears Snow

Perhaps the biggest advantage of idling first to warm up your vehicle is to clear snow on the windshield.

Similarly, the idle time is enough to warm up the cabin during winter or cold days.

How Long Should I Warm Up My Car Before Driving?

The ideal idle time to warm your car up should be the time it takes you to put on your seatbelt. Anything longer than that could accelerate engine wear, affect fuel consumption, and increase pollution.

On colder days, you can idle longer to warm up the cabin.

Do You Need to Warm Up Electric Vehicles?

Warming up electric vehicles (EVs) help in terms of power and battery life, as both are negatively affected by drops in temperature.

You can use the onboard computer or app that comes with your EV to precondition the battery. The process differs depending on the manufacturer.

This process is called preconditioning the battery. It’s when you let the battery reach the optimal temperature before driving or charging the vehicle. Preconditioning also works the other way by letting the temperature drop on warm days.

As for the ideal battery temperature, it should hover around 45°F to 50°F.

You can use the onboard computer or app that comes with your EV to precondition the battery. The process differs depending on the manufacturer.

The Bottomline

Warming up your vehicle before driving isn’t necessary. It has its advantages, but it can do more harm than good. As such, it’s recommended to let your car idle only during cold weather.

Restore Damaged Engine Components Online

As previously mentioned, parts like spark plugs and engine cylinder heads can wear out faster if the engine isn’t properly warmed up. When these components are damaged or worn, they can cause larger issues if they aren’t promptly replaced or fixed. You shouldn’t let worn-out parts linger. Luckily, CarParts.com can quickly get you the parts that you need.

CarParts.com is a trusted source of aftermarket replacement parts. We offer a wide range of engine parts that have passed the highest quality control standards from the most reputable names in the industry. Our parts are made from only the best materials available, so you’re sure that they’re built to last. You also don’t need to wait long for your order to arrive, as our strategically located warehouses allow us to deliver your parts in as fast as two business days. We’re committed to giving our valued customers the best shopping experience, which is why our products come with a lifetime replacement and low-price guarantee.

Check out our selection of spark plugs and cylinder heads and order yours today at CarParts.com!

About The Authors
Reviewed By Anthony Harlin, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Tony Harlin is a Master Gas and Diesel Diagnostic Technician with over 18 years of experience. He works full-time at a large independent automotive shop as a driveability and repair technician working on all types of vehicles with a focus on diesels. ASE certifications include A1-A9, L1 and L2, as well as X1.

Written By CarParts.com Research Team

Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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CarParts.com Research Team and Anthony Harlin, ASE Certified Master Automobile Technician