My Dad, an aviation mechanic
My Dad, an aviation mechanic in the Marine Corps during WW2 and later a Marine aviator retiring in 1966, taught me to check the engine oil at every fuel fill up. He was the type of guy who took good care of his stuff. Keep your shoes polished, check your oil when you fill the gas tank.
Those of you old enough will remember that this was standard procedure by the gas station attendant, who fueled your car, washed the windows, and checked the oil. While these days are long gone, and vehicle engines are much more durable than cars from the mid-20th century, it's still not a bad idea to be in the habit of checking the oil level when you fuel up. It also affords an opportunity to check your wiper fluid, and any incipient corrosion on battery terminals.