During her first year of driving my daughter managed to blow two engines one in my little Citreon that I had let her borrow for a few months, then in her Fiesta despite the fact that I'd always ask if she'd checked the oil and got a yes for the answer, turned out she thought 'checking the oil' meant oil change on a yearly service at the garage.
She definitely knows what it means now, but I still go out and check it when she comes over just in case.
