Modern vehicles are full of warning lights and indicators, and the average driver doesn't necessarily know what they all mean. Luckily, not all warning lights are cause for concern. One you definitely shouldn't ignore, though, is the oil change light. Also called the "maintenance required" light, it lets the driver know when their vehicle is due for an oil and filter change. "Oil change light" is a misnomer, since this doesn't usually look like other warning signals. More often, you'll see…