Gas prices aren’t what they used to be, and if you’re in a place like California, you feel it every time you pull up to the pump. I recently spent over $90 to fill my tank, and not that long ago, that same fill-up was closer to $60. When prices jump like that, even small habits start to matter more.

Most people focus on finding the cheapest station, but what often gets overlooked is how everyday choices affect fuel costs. Some habits outright waste money, while others wear down your car and cost you more over time. If you’re already paying more per gallon, it makes sense to avoid the common mistakes that add to the total.

1280px Diesel Gas Pump 54474872295 — Tony Webster, CC BY 2.0, via Wikimedia Commons

Using premium fuel when you don’t need it

Premium gas sounds like the better option, but most cars are designed to run just fine on regular fuel. Unless your owner’s manual specifically recommends it, you won’t get better performance or mileage by upgrading.

You’re simply paying more at every fill-up for no real benefit. Sticking with the correct fuel grade is one of the easiest ways to cut unnecessary costs.

Topping off after the pump clicks

When the pump clicks off, your tank is already full. Trying to squeeze in more gas doesn’t give you extra usable fuel and can actually cause problems. That extra fuel can evaporate or get pulled into the vapor system, meaning you paid for gas you won’t use. It’s a small habit, but one that can quietly waste money over time.

Running your tank too low

Letting your gas tank drop too close to empty can do more harm than good. Your fuel pump relies on gasoline to stay cool, so running low too often can cause it to wear out faster. There’s also a higher chance of pulling debris from the bottom of the tank into your system. Keeping your tank at least a quarter full helps avoid unnecessary repairs.

Filling up while a tanker is refilling the station

If you see a fuel truck unloading at the station, it’s usually best to come back later. The process can stir up sediment in the underground tanks, which may end up in your car. Over time, that debris can affect performance and fuel efficiency. Waiting or choosing another station is a simple way to avoid potential issues.

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Leaving your engine running while fueling

It might feel quicker to leave your car running, but it’s not worth it. Idling burns fuel without getting you anywhere and poses safety risks. Gas vapors are flammable, and turning off your engine is always the safer choice. This small habit can help you save more than you realize over time.

Ignoring a faulty pump

If a pump keeps stopping or isn’t working properly, it’s not worth the hassle. Faulty pumps can lead to incomplete fills or inaccurate flow, which can be frustrating and waste your time. Instead of dealing with it, move to another pump right away. It’s a simple fix that avoids unnecessary headaches.

Forgetting to tighten your gas cap

A loose gas cap might not seem like a big deal, but it can cause fuel vapors to escape. Over time, that means wasted gas and reduced efficiency. It can also trigger your check engine light, leading to unnecessary worry. Taking a second to tighten it properly helps prevent both problems.

1280px Chevron Gas Pump 307966687 — Image Credit: Person Lin from Taoyuan, Taiwan, CC BY-SA 2.0, via Wikimedia Commons

Filling up at the most expensive times

Gas prices can fluctuate throughout the week, and timing does matter. Filling up right before the weekend or during busy travel times can mean paying more per gallon. While the difference might seem small, it adds up over multiple fill-ups. Paying attention to timing can help stretch your fuel budget further.

Skipping rewards and discounts

Gas rewards programs and grocery store discounts are often overlooked. Even saving a few cents per gallon can make a noticeable difference over time. If you’re already shopping somewhere that offers fuel points, it’s worth taking advantage of them. Those small savings add up faster than you might expect.

Driving with extra weight in your car

Carrying unnecessary items in your trunk makes your vehicle work harder. More weight means your engine burns more fuel to keep moving. Over time, this can noticeably impact your gas mileage. Clearing out what you don’t need is an easy way to improve efficiency.

Not paying attention to tire pressure

Tire pressure plays a bigger role in fuel efficiency than most people realize. Underinflated tires create more resistance, forcing your car to use more gas. They also wear out faster, which can lead to extra costs down the line. Keeping your tires properly inflated helps your car run more efficiently.

Always choosing the closest gas station

It’s easy to default to the nearest gas station out of habit. However, prices can vary quite a bit even within a short distance. Taking a minute to check nearby options can lead to consistent savings. Over time, those small differences really start to add up.

Skipping basic car maintenance

Regular maintenance helps your car run more efficiently and use less fuel. Something as simple as replacing a clogged air filter can improve gas mileage. Using the recommended motor oil and staying on top of oil changes also makes a difference. A well-maintained engine doesn’t have to work as hard, which saves you money at the pump.

Driving aggressively instead of smoothly

Quick acceleration and hard braking burn more fuel than steady driving. Even small changes in how you drive can improve your gas mileage. Staying consistent with speed and avoiding sudden stops helps your tank last longer. Over time, smoother driving habits can lead to noticeable savings.

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Making the most of rewards programs

Grocery stores, membership programs, and Warehouse clubs like Sam’s Club and Costco often offer fuel discounts. Whether it’s cents off per gallon or rewards points from regular shopping, these perks can reduce your total cost. The key is actually using them before they expire. When combined with other habits, they can make a real difference in your fuel budget.