Your engine feels calm at a stoplight because a hidden idle system keeps fuel, air, and spark in balance. That quiet stability is not luck, it is the result of sensors, valves, and software working ...

I have a 2017 Lexus GX 460 with about 90,000 miles. My car has been making a squealing noise ever since I had the serpentine belt replaced.

Before Dieselgate happened, and the diesel card-house came tumbling down, we had this 800-mile-per-tank master of efficiency.