It’s been asked of every new mechanic for more than a century. Does it matter in 2025?

Ever spot what appears to be a second oil filter under a vehicle? Lemmy and Nick discuss the advantages of spin-on transmission filters for fluid protection and service.
Peering inside the inner workings of a deceptively complex tool
Lemmy explains why this basic task always comes before removing the positive cable to help you understand the theory behind the practice.
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Auto care news and advice you can use.
And the most misdiagnosed.
Once the most basic of circuits, the humble lamp has also progressed.
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There are many types of punches. There’s a reason for that.
A helpful video investigation of proper (and improper) torque wrench techniques and habits.
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Auto care news and advice you can use.
Technician A is diagnosing a misfire. He states that a misfire is caused by a fault in the ignition system and that new plugs and coils will repair the problem. Technician B says that a misfire is detected when the ECM detects a variation in crankshaft speed.
Just when you thought The Golden Rule was out of style, this independent repair shop and used car sales center proves otherwise.
It might be time to rethink oil changes.
There’s two ways to use tire mounting compound.
Get up to speed on a safety feature not often seen in the United States.
You can’t sell what you don’t understand.
A fluid transfer pump is the cleanest and easiest way to fill a differential, transmission or transfer case with its necessary fluid.
Formal education teaches you theory and the real world teaches you the rest.