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Economics

I’m afraid your dealer is looking for what we call A.D.P. — Additional Dealer Profit. So I would go to Google Maps, get him directions to the nearest lake and suggest he drive there and jump in it.

Several decades ago, fuel injectors would get dirty after some tens of thousands of miles. And we had a big machine at the garage that we called the Wallet Vac. It was actually called the MotorVac.

The MotorVac would run a solution through the fuel system and clean out the dirty injectors and valves. And at one time, we probably used that machine three times a week.

But in recent decades — to address that problem — carmakers have worked closely with the gasoline companies to make what they call “top tier” fuel, which is super clean. It includes detergents, too. And we hardly ever see dirty fuel injectors on modern cars anymore.

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