Synthetic oil changes cost nearly double conventional, but shop costs don’t justify the premium. AAA research found synthetic oils perform 47% better in laboratory tests, measuring factors like ...

Oil is the lifeblood of an engine, and changing it regularly is a simple act of maintaining your car. Doing so will keep it running smoothly and to prevent sludge and debris from building up inside.

It’s a routine part of car maintenance, but some drivers are shocked to see their oil change bills climbing toward $100, even without extra repairs. “It’s ridiculous," one driver told CBS News. And ...