When to change oil in a new car?

Answer 1

The old rule of thumb years ago, in old fashioned engines, was 3,000 miles. In today's new cars with better engines this is wasteful, bad for the environment, and completely useless. Today's better designed engines can go much longer, often around 6,000 but it depends on what your owner's manual says.

Changing it more often will NOT improve performance or make your car last longer.

Follow your owners manual, always. It will tell you how many miles based on YOUR engine design, and based on if you do mostly highway driving or stop-and-go city driving.

The owners manual is written by the engineers who designed that engine, so do what it says because they are the experts. Do not listen to what some guy on the street says, or what I say, or what the guy at the lube shop tells you to make a buck.