Top 10 Biggest Mistakes Car Owners Make

August 12, 2024

Owning a car is a huge financial investment, but a necessary one. It goes without saying that vehicles need routine maintenance and repair and unfortunately delaying maintenance is one of the biggest mistakes car owners make.

Mechanic reaching into an open orange toolbox drawer filled with tools. | Joe's Slinger Service

Top 10 Biggest Car Mistakes Joe’s Slinger Service Slinger WI


Whether you drive a new vehicle or a late-model vehicle, avoid these 10 costly mistakes.


1.Starting your car and driving off immediately.


Your vehicle’s engine is a collection of moving parts. Those parts rely on fluids and lubricants to move freely. When your car has been resting, those fluids cool down and congeal. For them to flow through the engine again, the vehicle’s motor needs to run. This is why it is so important to allow your car to warm up after you start it. Even 30-60 seconds of uninterrupted run time is enough to distribute critical fluids through your engine and decrease wear and tear.


2.Using the Wrong Fuel


May sound found ridiculous, but many drivers are using the wrong fuel in their car. Your vehicle’s owner manual will tell you what type of fuel to put in your car. IF it recommends premium fuel, you should only be using premium fuel and the same goes for any car that a manufacturer recommends to run on regular fuel.


3.Changing Oil Too Infrequently


Think of your car’s oil system as its heartbeat. If your oil gets dirty or depleted, it’s impossible for your engine to run well. You should be changing your oil every 3,000 -5,000 miles as per your owner’s manual tells you. Changing your oil too often or too infrequently can damage your car’s engine.


4.Failing to Check Tire Pressure


For the best handling and control, your car’s tires need to be properly inflated. You don’t want to over-inflate them and you certainly don’t want to under-inflate them. Check your tire pressure when you fill up at the pumps and add air as needed.


5.Driving on Bald Tires


Driving on bald tires is dangerous and irresponsible. Cars with bald tires don’t handle well and aren’t safe during wet or inclement weather conditions. Make sure to check your tread depth each year. A way to check this is by taking a penny, turning it upside down, and inserting it between the grooves of your tires. If you can see Lincoln’s head, your tires are bald. Just think about all you have riding on those tires and make the investment for new ones before they become unsafe!


6.Ignoring Check Engine Lights


Manufacturers put those nasty check engine lights on your dashboard for a reason! They are trying to tell you something and ignoring your check engine light is a recipe for disaster!  Sometimes the issue could be something as simple as a code, but it also could be something as serious as a faulty catalytic converter.


7.Not Keeping Up with Routine Maintenance


It is very easy to keep up with vehicle preventive maintenance such as oil changes and filter replacements. This stops problems before they start! However, IF you neglect these easy routine tasks, you’re putting your engine at risk for damage resulting in costly repairs and replacements!


8.Ignoring Strange Noises


Don’t turn up your radio hoping to drown out that noise you have been hearing for so long. There are only two ways to know if your vehicle has an issue that needs attention. One is the dashboard lights, and the other is listening to noises as you drive. If you hear banging, popping, whistling, grinding, or any other sound that is not normal to your car, it’s critical to get it checked.


9.Not Replacing Air and Fuel Filters


To keep your car running well, you need to check your vehicle’s filters at least every six months. Not only your cabin air filter, but other air and fuel filters decrease your engine’s workload, thereby reducing wear and tear and improving your car’s lifespan. Replacing those filters regularly is a simple way to keep your car running well.


10.Ignoring Safety Recalls


Safety recalls are a HUGE deal for car owners. If you become aware of a safety recall that affects your vehicle, contact a dealership to schedule any needed repairs immediately. The repairs will be free and could save you time, money, and injury down the road.

February 11, 2026
Most Slinger drivers are aware that manufacturers have service intervals for your car . The engineers that design our vehicles have tested the various systems and components to meet durability and safety standards. Some of these standards are self-imposed and others, like those for emissions components, are government mandated. The maintenance schedules are designed to achieve the standards. Think of the benefits of following recommended intervals as falling into three general categories: Protection, Efficiency and Safety.  Protection . Let’s start with motor oil. First of all, the engineers recommend a particular weight and type of motor oil. All of their oil change recommendations assume using the proper motor oil. Motor oil contains detergents and other additives that clean the engine and provide corrosion resistance. Over time, the additives are depleted. The oil also becomes contaminated by water, dirt and combustion gases. Extending your interval beyond the recommendation means that your engine will be operating without the full protection of fresh motor oil. It also means that sludge can form in contaminated oil and clog up passages in the engine, starving parts from needed lubrication. Efficiency . Some Slinger services are designed to keep automotive systems operating efficiently. For example, the fuel system gets clogged up with gum and varnish from the fuel. Fuel doesn’t flow efficiently which reduces fuel economy. A fuel system cleaning restores the fuel system’s efficiency and increases your gas mileage. Safety . Your brakes are obviously one of the most important safety systems on your vehicle. The has scheduled brake pad replacement as well as power brake fluid drain and replacement intervals. Because brakes are so important, a brake inspection is also on the schedule to head off problems before they result in an accident. Check your owner’s manual for recommended service schedules or talk with your friendly and knowledgeable Joe’s Slinger Service . You may be surprised to learn that various inspections may be on your list of factory recommendations. These inspections are usually at major intervals like 24,000 miles or 40,000 kilometers. They’re designed to uncover important parts that may be close to failing. Your owner’s manual can tell you when to change your oil, but it can’t tell you that you have a radiator hose that’s bulging and about to burst. For that you need a technician. These scheduled inspections are in addition to the multi-point inspections done with a full-service oil change at Joe’s Slinger Service.
Comparison of Budget (EverStart) and ACDelco car batteries, highlighting features. Blue and black background. | Joe's Slinger Service
January 22, 2026
When your car won’t start, the battery suddenly becomes the most important part of your vehicle. And when it’s time to replace it, many drivers are faced with a choice: grab the cheapest battery available or invest in one built for long-term reliability. At first glance, a budget battery from a big-box store like Walmart may seem like the obvious choice. But there’s more to the story than upfront cost. The Truth About Budget Batteries Budget batteries are designed to do one thing: start your car at the lowest possible price . For some drivers, that’s enough. These batteries are generally best for: Older vehicles with minimal electronics Light, short-trip driving Drivers who don’t mind replacing a battery more frequently While they can work, they often have: Shorter overall lifespan Less consistent cold-weather performance Limited reserve capacity for accessories and electronics That’s why many budget batteries fail sooner—especially in extreme temperatures or vehicles with modern electrical demands. Why We Choose ACDelco Batteries Today’s vehicles rely on far more than just a starter motor. From infotainment systems and safety features to remote start and stop-start technology, modern cars demand strong, consistent power . ACDelco batteries are built with higher-quality internal components designed to: Deliver stronger cold-cranking performance Handle higher electrical loads Last longer under real-world driving conditions Provide dependable warranty coverage In short, they’re engineered for reliability , not just price. Cost vs. Value: What Really Saves You Money? A lower-priced battery may save money today—but if it needs to be replaced sooner, struggles in winter, or leaves you stranded, that “deal” quickly disappears. A quality battery: Reduces the risk of no-start situations Lasts longer, meaning fewer replacements Performs better year-round Gives peace of mind every time you turn the key That’s why we don’t recommend batteries based on price alone. We recommend them based on what keeps our customers driving with fewer problems . Our Recommendation If your vehicle has modern electronics, sees extreme temperatures, or you simply want fewer battery issues, an ACDelco battery is the smarter long-term choice . We install batteries we trust—because your vehicle’s reliability matters to us. If you’re unsure which battery is right for your vehicle, stop by or give us a call. We’re happy to help you choose the option that fits your driving needs and keeps you on the road.
Mechanic using a tablet while examining a blue SUV with the hood open in a garage. | Joe's Slinger Service
January 20, 2026
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Spare tire inside a car trunk. Black wheel with tire, set in a compartment. | Joe's Slinger Service
January 12, 2026
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