Hi, I just found out my mother has driven 8k miles with her 98 Corolla CE since she last changed her oil. I insisted she go with Mobil 1 synthetic last time she had it done, so I know it can safely go 5k (or more?). Other than making sure she changes it ASAP, and keeping her with a good synthetic, does anyone have any advice as to what we can do to diagnose any damage she might have done? The car has only 53k miles, and is mostly city-driven, though rather gingerly.
Thanks!