Nothing at all, this car went 2 1/2 years without an oil change and it is running perfectly fine. Never been in the shop for any servicing.
By the way, my mother had the car for those 2 1/2 years.
This car is quick, not much top speed, but the acceleration is amazing for much a large car.
Very spacious interior and massive trunk.
Be careful with aftermarket speakers, the factory amp is not strong and will blow fast.
When the engine seizes due to sludge, remember those 2 1/2 years without an oil change!
Yes, 2 1/2 years without an oil change, and when the engine seizes up, they or the subsequent owner will be back saying "this car is a piece of junk, the engine seized for no reason at all, and I will never buy American again!!!" Some people are not quite with it.