换不换 或者 换没换 确实是个问题, 找正规的 shop (我是到dealer or walmart )花几十块钱买个安心

Many automakers have oil-change intervals at 7,500 or even 10,000 miles and 6 or 12 months for time.

“Your owner’s manual has more detailed information about your car than any mechanic does,” Ibbotson says. “Don’t get talked into too-often oil changes. Follow the manual and your car’s engine should stay well-lubricated and perform well.”