Here are 2025's most popular questions and answers from The Journal's Car Doctor column, from rotating tires to oil changes.

GM has released a new customer satisfaction program for the Chevy Equinox EV and Blazer EV, addressing an issue with the drive motor power control module.

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Khadija Khartit is a strategy, investment, and funding expert, and an educator of fintech ...

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Ellen Lee Ellen Lee is a ...

Control theory is a branch of mathematics and engineering, which defines the conditions needed for a system to maintain a controlled output in the face of input variation. Classically developed for ...