So why did VW "cheat"? Uncle?

That question hasn't been asked enough. It ought to be.

Now we have the answer – confirmation of what I suspected and wrote about earlier when this "scandal" broke last year.

VW "cheated" because it had to.

Because "cheating" was the only way to keep on selling diesel engines that delivered the mileage buyers expected at a cost that made economic sense to them.

Satisfying Uncle – passing his Rube Goldberg-esque emissions tests, which among other defects don't measure the totality of a vehicle's output – grams per mile –  but rather sample parts per million (PPM) with the vehicle in a stationary test rig, would have entailed a noticeable reduction in fuel efficiency and a very noticeable uptick in the cost of the vehicle. Or rather, the cost of the additional hardware necessary to placate Uncle.

Now there's proof of this.

European Uncles have discovered that diesel-powered VW vehicles "fixed" to comply with the tests use more fuel now – which is a problem over there because European Uncles also regulate carbon dioxide (C02), which is classified as a "pollutant" because Global Warming (whoops, Climate Change).

The more fuel used, the more C02 produced. You see the problem.

Which isn't the displeasure of the European Uncles.

It's the fact that you can't have your affordable/high-mileage diesel cake and eat your making-Uncle-happy, too. There is a reason why there are no modestly priced diesel-powered cars available in the United States … now that VW's cars are off the market.

VW was the only automaker selling them – and now, they're not.

And not likely to, ever again.

You can make a diesel that makes Uncle happy. But you can't make one that makes Uncle happy and which is also affordable to buy and delivers mileage high enough to offset the always-higher price of buying a diesel car vs. the equivalent gas-powered version of the same car.