I think you should look at the demographic of people who purchase lower cost Nissan's and their behavior as to maintenance. If you buy the cheapest vehicle available perhaps you don't spend the money on maintenance. Maybe the cost of oil changing is outside the budget? Plug and play....how many miles can you extend the oil service interval, 50,60,70k miles?Maybe I am prejudiced but I feel that folks that don't have the wherewithal to purchase a better car, end up with low line models at horrendous interest rates with forever payments.