Not that changing it more often is bad for your car.
"It doesn't hurt the engine, says AAA's Sinclair. "It might hurt your pocketbook."
Rather than relying on an arbitrary - and outdated - rule of thumb, read your cars owner's manual for the recommended oil change interval. It will usually be longer than three months/3,000 miles. Many cars can go twice that long before needing an oil change, says Sinclair.
New synthetic oils can be left in even longer, sometimes tens of thousands of miles, says Sinclair.
But Consumer Reports' Ibbotson recommends sticking with the car manufacturer's suggested oil change interval regardless of what the lubricant's manufacturer may claim.
