The best time to check your oil is before you start driving. However, this does not mean that it’s a good idea to forget about checking your vehicle for a few weeks or months at a time. Doing so can be dangerous and may result in engine damage while preventing the owner from getting the proper maintenance done on their car. For example, one of the most common reasons why people fail to check their oil often enough is that they drive their vehicles all through winter without changing the oil once! This leaves them with low levels of lubrication which can be damaging to cars over long periods of time.