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Alignment and Inner Tie Rod Play – ASE Practice Question (VIDEO)

Description A vehicle equipped with a MacPherson strut suspension is in the shop for new tires and an alignment. The technician notes play in the left-side inner tie rod end. What should the technician tell the customer?A) The play will not affect the vehicle's...

Put the Second Floor to Work

Paying the mortgage (or the rent) on the bricks—the actual shop itself—is an expense. (A fixed cost, if you want to be particular.) But that building does more than keep your tools and techs dry. It provides room to work and house equipment. And if you’re like most...

How Does Regenerative Braking Affect Brake Wear?

We’ve come a long way since the days of rubbing wooden blocks against a wagon wheel to slow down a carriage. Modern braking systems are amazingly effective at halting several thousand pounds in a safe, controlled manner. The most common automotive braking technique is...

Don’t Overlook the Elementary

Today’s article is one borne from experiences. Exasperating experiences, no less. All novice mechaniclets are taught engines need fuel, air, spark, and compression to run. This is true, but we often take those for granted, and diagnosing even one vehicle with a basic...

ADAS Alignment and Calibration – ASE Practice Question (VIDEO)

Description Technician A says that the thrust angle must be maintained at zero degrees when performing an alignment on many vehicles equipped with certain ADAS systems (like lane departure warning). Technician B says that the steering angle sensor must be properly...

Watch This Video on the Inventor Who Put Lead in Gasoline

by | May 1, 2025

Recently, I went down an internet rabbit hole about why gasoline once had lead in it and how it got removed. In my searches, I found this video on inventor Thomas Midgley Jr., who not only invented leaded gasoline to combat engine knocking but also synthesized chlorofluorocarbons (CFCs).

Midgley’s work transformed cars and transportation: cars were more reliable, more convenient, and more comfortable as a result of his work. However, in doing so, he also invented a gasoline that was dangerous to both humans and the environment. For better or worse, he raised the bar for what the automobile could be and do.

With CFCs, Midgely made air conditioning and refrigeration more commercially viable and affordable when it was not, improving the quality of life, food safety, and industrial processes for Americans. Again, however, he also invented a chemical that was bad for the environment.

Midgley was not immune to the dangers of his inventions, as he himself suffered from symptoms of lead poisoning and had to take a break to recover.

Check out this video on Midgley and his inventions, which, despite their benefits, have unfortunately also caused damage to human life and the environment.

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