Castrol recommend checking engine oil every couple of weeks (or 1000 miles) and always before a long trip.
Here at Castrol, most of our people pop the bonnet and check their oil level at least every couple of weeks (or 1000 miles), and always before a long trip. It only takes a minute to check and top up if necessary, and it might add years of reliable, powerful and economical driving to the life of your engine.
Naturally, it's essential to change your engine oil at the intervals recommended by the manufacturer. In the days before oil level sensors, many drivers checked their oil at the dipstick at least once a week.
Unless you're running an older car, that may not be necessary these days. Having said that, new cars can still require topping up so it is important to check your oil level regularly.
Whatever vehicle you are driving, environmental factors such as fuel quality, extreme temperatures or stop-and-go driving can increase the amount of oil your engine uses.