WSJ.com: Me & My Car

There are benefits to using synthetic oil in a car or truck, but there are also myths about it.

While tire pressure monitors are a useful safety device, they bring additional costs to the traditional winter-tire swap.

Why are there dramatic differences between what gas stations charge? Plus, answers to questions on big tires on family cars, whether to upgrade a Chevrolet Suburban and changing the oil on a new Me...

What's a safe, fuel-efficient, inexpensive car? Do you need to change power steering fluid? Jonathan Welsh answers readers' questions.

Readers offer more advice on how to get the best deal when purchasing a vehicle: Cash isn't always king. Plus, where to put your snow tires and maintaining a fleet of three cars.

Tips and advice on the best ways to keep a car, truck or SUV running reliably and efficiently for a long time on the smallest possible budget.

This week, Jonathan Welsh answers questions on whether paying cash gets you the best deal when buying a new car, using fuel-injector cleaners, finding an all-wheel drive minivan and keeping two cars.

This week, Jonathan Welsh answers questions on choosing between a built-in or portable GPS navigation system, finding a sedan for a very tall driver, the benefits of snow tires and the right vehicl...

This week, Jonathan Welsh answers questions on the gas guzzler tax, when the next version of the Toyota Prius is coming and replacing an older Ford pickup and an Infiniti.

This week, Jonathan Welsh answers questions on finding a high-performance sedan to replace an aging BMW M5, the future of Subaru engines, will Infiniti bring back its Q sedan and hanging on to a Fo...