Think of it as insurance
As a youngster, I used to do oil changes and simple maintenance on our cars. When we lived in St. Louis in the early 1990s, my good friend and co-worker changed his oil too. At the time, he had a relatively new small pickup truck. Well, you can probably guess what happened. He changed his oil and did not properly secure the drain plug. He ended up blowing his engine. After that, I started bringing my cars to a mechanic for OLFs and routine maintenance, as well as bigger things. I thought of it as a small price to pay (an insurance policy) given what can go wrong.
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