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Shutterstock/nano-stocker/Oren Aks

Change your own oil

Is it absolutely a requirement that you change your car's oil yourself every single time? No, but when you go to a quick-lube place, you run the risk that they'll screw something up. Get a cheap pair of ramps and do it yourself, unless you've got one of those uptight parking-lot security guards staring you down the whole time.

Read a dipstick

Dipsticks tell you if your car has enough or too much oil in it, but that's not all. They'll also give you a sense of how bad the oil is, and potentially how poorly the car is maintained. If you're checking out a used car, for example, and you find grit in the oil that's on the dipstick... just walk away.

Jack up your car

There's a good way and a bad way to jack up your car. Putting a jack under your oil pan, for example, is an excellent way to transfer all of the oil from your engine to the floor of your garage before you replace, well, your oil pan. There are several areas where it's best to put a jack, but if you're unsure, consult your owner's manual. It'll tell you the best spot for your specific car.

Change a tire

The simple fact is that run-flat tires are making the very existence of spare tires more and more rare in today's world. That's no excuse to not know how to jack up your car and change a tire, like the guy in that awful "Handy Man" commercial.

Torque your lug nuts

There are a few points here. First, don't just cinch your lug nuts as tightly as you can get 'em or you'll want to go back in time and kick yourself for doing so as soon as you need to get them off. Use a torque wrench to get them to your manufacturer's specified range -- no more, no less. If you don't have a torque wrench, get one, then use it to torque every other lug nut in a star-shaped pattern (diagonally across from each other) until you've done them all.

Jump-start your car

Look, it's not that difficult. Positive clamp on dead battery. Positive clamp on good battery. Negative clamp on good battery. Negative clamp on bare, grounded metal on car with dead battery. Start good car, wait a couple of minutes, start dead car. Unclamp everything in reverse order and do not touch the clamps to each other. Now go drive your car for a while to let the alternator charge it up.

Or, you know, wait a few hours for AAA to send someone.

Change a spark plug

Unless your car is 100% electric (Nissan LEAF, Tesla, etc.), you've got spark plugs. While they certainly will last an order of magnitude longer than plugs in the olden days, they still need to be changed, and dealerships are truly thrilled at the prospect of overcharging you to do something that can be done at home. If you don't know what you're doing -- and it is a bit more involved than it used to be -- head to YouTube and you'll almost definitely find someone changing the plugs on a car just like yours.

Change a radiator hose

Some cars today have approximately 947 hoses, and you'll never get to all of them if you're attempting a DIY repair on the side of the highway. A coolant hose, however -- the big hose that runs from your radiator -- is the one most likely to go, but it's also the easiest to change, usually.

Identify and change a fuse

Chasing electrical problems is the bane of every shade-tree mechanic's existence. For a given problem -- as in, your taillights all went out at once -- you should first hope that it's just a fuse, then proceed to track down the appropriate culprit based on the symptoms. See your manual for a fuse map.

http://Shutterstock/gameanna/Oren Aks

Understand the difference between HP and torque

One is a rotational force, and the other is a metric based on that rotational force, multiplied by the measured RPM, divided by 5,280.

Buff out minor scratches and swirls

One small scratch might seem like a nuisance, but if you don't take care of one, the next thing you know, your car will be covered in them. Learning how to use things like rubbing and polishing compounds with an orbital or random orbital polisher is a skill that takes just a few hours to adequately learn, and one that pays huge dividends for the rest of your life.

Correctly set tire pressure

If you can't figure this one out, you haven't been paying attention.

Restore headlight lenses

Those foggy, yellow-y headlights on your car are actually kind of a safety hazard, reducing your visibility at night. With less than half an hour of wet sanding with ultra-fine sandpaper and polishing with a rubbing compound, they'll be crystal clear, and you won't look like the rookie car guy who doesn't know a damn thing about polishing.

Change your brake rotors and pads

Companies love to charge you plenty of money to "do a brake job." Why on Earth would you ever pay for something that's almost as simple as jacking up the car and removing a few bolts, replacing a few parts, and tightening everything back down?

Bleed/flush your brakes

If you ever plan on going to a racetrack, you should flush your brake fluid, and bleed it if you've not done so lately, or if your brake pedal is getting soft. If you have no idea what I'm talking about, find your brake fluid reservoir. If the fluid is black, that's very bad.

Optimize a grocery cart's handling

Cars are all about physics. Acceleration, deceleration, friction, heat transfer... you name it. When it comes to handling, a well-engineered car keeps as much of its mass as close to the center of the car as possible -- think mid-engined Ferrari and you've got the idea.

With that in mind, whenever I see someone in the grocery store with a case of beer sitting in the very front of the cart, my first thought is "not a car person." Try it yourself -- put your heaviest objects in the back of the cart (which, when you include yourself in the equation, is the middle), and you'll see how much easier it is to handle around the grocery store. If you take a proper driving line through the store (which you should, because it's fun) it'll give you a whole new appreciation for engineering.

Flickr/Nic Redhead/Oren Aks

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Things All Self-Respecting Car Buffs Should Know How to Do

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Is it absolutely a requirement that you change your car's oil yourself every single time? No, but when you go to a quick-lube place, you run the risk that they'll screw something up. Get a cheap pair of ramps and do it yourself, unless you've got one of those uptight parking-lot security guards staring you down the whole time.

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The energy system of the future is intelligent -- we call it Smart Grid. Produced for Energinet.dk by storywise. For more information about Smart Grid visit: http://energinet.dk/EN/forskning/energinet-dks-forskning-og-udvikling/smart-grid/Sider/default.aspx