This may seem a stupid question( no don't start!) but when I start my 2008 Boxer 3 litre motor home engine a number of dots appear on the LCD screen and the word oil. They disappear after a couple of seconds. Does this indicate a countdown to an oil change, oil level ,oil pressure or what? Does more dots mean good or bad? Looked though the handbook for information but just not there . There are usually 3 or 4 dots that appear. The oil level on the dipstick is correct.