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Common Fuel Efficiency Myths Debunked

It Takes More Fuel to Start a Car Than to Idle

You’ve likely been told at some point that idling uses less fuel than starting your car. That probably made you wonder why more and more cars are adding a function to auto start/stop your car when it comes to a halt. Aside from it being potentially annoying at a stop sign or in traffic, why would they want to add a function that causes your fuel economy to take a hit? That’s because it’s better to stop fuel from injecting into the engine while sitting at a light instead of continuing to idle, even if you shift into neutral.

Modern Engines Start More Efficiently

This myth likely comes from when cars had carburetors and it did take more effort to start a car. Now, modern cars are computerized, meaning it’s easy to shut off the fuel injectors while idling so that less fuel is spent while your car is sitting still.

The Older a Car is, the Worse its Fuel Economy Becomes

Think your used car will get worse gas mileage than a new car, just because of its age? Think again. Gas mileage has much less to do with the age of a car and much more to do with how well it’s maintained. That used car you’re considering should get the same fuel economy as when it was brand new if the previous owner kept up with its maintenance schedule.

Regular Maintenance Keeps Cars Healthy

The best way to ensure your car keeps the best fuel economy and overall performance possible is to keep up with regular maintenance. This includes regular oil changes, transmission fluid flushes, tune-ups, and any other servicing recommended by your car’s manufacturer.

Using Premium Fuel Improves Fuel Economy

No, premium fuel isn’t better for any car you put it in. The reason for different fuel grades is more about the variety of engine types than improving fuel economy. Some engines are built in a way that requires higher-octane, premium fuel, while others are built for regular fuel. You won’t benefit from using a fuel type that’s different from what’s recommended by the manufacturer.

Stick with the Recommended Fuel in Your Owner’s Manual

Just bought a new car or using a rental car? Take a look at the owner’s manual before you fill-up the gas tank for the first time. Using the wrong type of fuel can cause more problems than just worse fuel economy – it could lead to engine damage.

A Dirty Air Filter Leads to Worse Gas Mileage

In modern cars, air passes through both the air filter and the mass airflow sensor as it flows into the engine, so the amount of fuel can be adjusted according to how much air is actually being brought in. This means your fuel economy won’t take a hit from a dirty air filter. This myth likely came from older cars where air came indirectly from outside, through the air filter, then into the carburetor and it was possible your fuel economy could be lower with a dirty air filter.

However, a Dirty Air Filter Can Impact Acceleration

It is possible that you could notice an impact on your acceleration power with a dirty air filter, even in a newer car. This is because if less air is coming into your engine due to a dirty air filter, the amount of fuel will be adjusted to match, but you’ll end up with less power than you should have.

Going Longer and Keeping You Safe

AAMCO Colorado is here to help. Count on us to help you with any car issues you are experiencing.

Cruise Control Saves Gas

Your car’s cruise control helps maintain a relatively even speed, so that should improve fuel economy, right? Not necessarily. When you hit a hill while using cruise control, it can feel like you just stamped your foot down on the accelerator and that will use extra fuel whether you’re using cruise control or do it yourself.

Pay Attention to Terrain When Using Cruise Control

On flat terrain, it may be true that cruise control can save you some gas mileage. However, if you see a hill coming up or are driving longer distances over uneven terrain, it may be best that you just control your car’s speed on your own – or at least know that you aren’t saving any money on fuel economy if you do use cruise control.

Time for a Fuel System Service? Head Over to AAMCO Colorado

the best way to maintain healthy fuel economy is by keeping up with recommended regular maintenance. If it’s time for your next service, make an appointment with the expert mechanics at AAMCO Colorado and we’ll ensure every essential system is in optimal condition.

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