The Silent Diesel Problem: What Drivers Miss Until It's Too Late
Diesel engines run quieter than they used to, butthere's a hidden problem growing under the hood that most drivers never notice. Thousands of trucks and cars roll down highways every day with diesel exhaust emissions slowly climbing higher, and nobody realizes it until a failed test or a breakdown forces the issue into the open. The signs are there, but they're easy to ignore when the engine still starts, and the vehicle still moves.
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