I answer a lot of questions on Quora. Many of those questions are about automotive things that may be of interest to CarNewsCafe readers. Like this one.

If oil catch cans are so great for direct injection engines, why don’t manufacturers install them from the factory?

My Answer: Three things: cost, maintenance, and questions about efficacy.

Starting with the first point, the catch can adds cost to the car’s design and build. It has to prove itself worth that cost if it’s to be added.

The second point is maintenance. Adding another point of maintenance to the vehicle for the owner to have to worry about is generally not a selling point. If it weren’t, there’d be a lot more diesel-powered cars on American roads than there are. Having to add urea and learning that oil changes are often far more expensive puts people off.

The third point is efficacy and ties into the other two because if it’s not worth it, manufacturers aren’t going to add it. The only real testing that’s been done with scientific backing is that done by the SAE. Their test, however, involved a very high-mileage vehicle and only that one vehicle. That’s far from conclusive.

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An automotive enthusiast for most of his adult life, Aaron has worked in and around the industry in many ways. He is an accredited member of the Rocky Mountain Automotive Press (RMAP), the Midwest Automotive Media Association (MAMA), and freelances as a writer and journalist around the Web and in print. You can find his portfolio at AaronOnAutos.com.

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