Cars are a regular part of daily life, which means most people have heard plenty of advice about fuel, maintenance and performance. The challenge is knowing which tips are helpful and which are simply myths that have been passed along over time.
Premium Gas Will Make Your Car Perform Better
Premium fuel does not automatically improve mileage or performance. If a vehicle is designed for regular unleaded, using premium typically will not make it run better or more efficiently. However, if the manufacturer recommends premium fuel, using regular instead can affect engine performance and fuel economy. The best approach is simple: use the fuel type recommended in your owner’s manual.
You Should Let Your Car Warm Up Before Driving
That advice made more sense years ago, when vehicles relied on carburetors and thicker motor oils. Today’s cars use fuel injection systems and modern oils that circulate much faster. In most cases, letting your car run for about 30 seconds to a minute is enough before you start driving.
You Should Wait Until You’re Out of Gas to Fill Up
It is better not to wait. Running on a very low tank too often can put added strain on the fuel pump, since gasoline helps keep it cool. To avoid unnecessary wear, many drivers choose to refill when the tank reaches about one-quarter full.
Using Your Air Conditioner Decreases Fuel Efficiency
Running the air conditioner can use a small amount of extra fuel, but the impact is often less significant than people expect. At highway speeds, using the AC may actually be more efficient than driving with the windows down, since open windows can create drag and reduce fuel economy.
You Can Wash Your Car Using Dish Soap
Dish soap may seem like a convenient option, but it can strip away wax and gradually wear down your vehicle’s clear coat. A car wash soap designed specifically for automotive finishes is the better choice.
Oil Should Be Changed Every 3,000 Miles
That rule no longer applies to many modern vehicles. Thanks to improvements in engine technology and oil formulations, some cars can go 5,000 to 7,500 miles—or even longer—between oil changes. The most reliable guide is your owner’s manual, which outlines the recommended interval for your specific vehicle.
Understanding the facts behind these common car myths can help drivers make smarter maintenance decisions, avoid unnecessary costs and feel more confident about how they care for their vehicles. A little accurate information can go a long way toward keeping a car running well over time.