What size socket do I need to change oil?

To change oil, you typically need a socket to remove the oil drain plug, which is commonly a 13mm or 15mm size, but it can vary depending on the vehicle make and model. It's best to check your owner's manual for the exact size. Additionally, having a ratchet and an extension can make the process easier. Make sure to also have the proper tools for the oil filter if you plan to replace it.