But while you may not think too hard about buying a loaf of bread from your local Walmart, it's easy to be more skeptical of ...

Drive-up oil change services—like those offered by Walmart and Valvoline—are a convenient way for drivers to get regular car maintenance without scheduling appointments daya in advance.

“They have good insurance,” wrote one viewer. “And where else can you get your oil changed for $25?” Getting your oil changed is one of the realities of owning a car. Walmart is well-known ...