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Color image depicting a man checking and maintaining the engine of his car, making sure everything is in working order.
coldsnowstorm/istockphoto

While going to the mechanic can be one of the most classic ways to blow money that there is, that doesn’t mean it’s always unnecessary. Mechanics have a lot of things you don’t have: training, for one. If you’re going DIY for car maintenance, you want to make sure you know what you’re doing. The next time you work on your car, do whatever you can to avoid these seven damning mistakes.

Overestimating Your Skill

Mechanic works on car in his home garage. He is working on the wheels and rotors and has the tires off.
FatCamera/istockphoto

Let’s start here. Are you sure you can do this? Seriously, though. There are a lot of things best left to pros and you’re not here to make things worsefor your car. Unless you truly know what you’re doing or you’re going for some incredibly minor maintenance, maybe just hire somebody.

Ignoring the Right Materials and Gear

Mechanic hand checking and fixing a broken car in car service garage.
standret/istockphoto

Skill is skill, and knowledge is knowledge, but no matter how much of that stuff you have, you can’t do anything without the right equipment. Use the right tools. Wear the right safety gear. Install the right parts.

Trying to Memorize Parts

Concentrated mature man fixing his car engine outdoors
Morsa Images/istockphoto

Unless you have a super mind, it will get confusing when you start taking things apart. This is what a label machine is for, or at the very least, this is what Post-Its are for.

Buying Cheap Parts

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Usually we’re about being frugal, but sometimes, third party parts and accessories just don’t work as well as the name-brand stuff. The reason the dealership wants to use those more expensive parts? Probably because they’re better, and that’s something your car and your safety deserve.

Working Unsafely

Mechanic lying down and working under car at auto service garage. Technician vehicle maintenance and checking under car at automotive motor garage.
kckate16/istockphoto

You jacked up your car in the correct spot, right? It’s not going to fall down on top of you or anything? And you’re wearing gloves and goggles, yeah? Not touching hot radiators and hot oil with your hands, no? These things are imperative.

Using the Wrong Fluids

Pouring oil to car engine. Fresh motor oil poured during an oil change to a car
Phynart Studio/istockphoto

Before you permanently damage your car, make sure you know what you’re pouring into it. Get the correct coolant, buy the proper oil, and only dump water into the one tube you’re supposed to.

Passing Over the Owner’s Manual

Senior man driver stopped in the street for a car breakdown, the hood open waiting for roadside assistance. Looking at the instruction booklet
lucigerma/istockphoto

It doesn’t matter what the guy with the soul patch on YouTube says. Your owner’s manual is the best place to start when it comes to your car, and if you’re doing something the owner’s manual specifically says not to, you’re making a huge mistake. Don’t be the person who needs to get a new car because you ignored the instructions.

Meet the Writer

Wilder Shaw is a staff writer at Cheapism who has written for publications like The Washington Post