Rumbling noises in a 10-year-old car could be tires or suspension issues. If your speedometer is reading high after an oil change, the unit may have been switched from miles per hour to kilometers.

Q: I have a 2015 Hyundai that is still like new. However I get a rumbling noise, I think from my tires. It is most noticeable if the road is not perfectly smooth. Do you agree, or could the sound be ...