Here are the matched symptoms of older engines with the corresponding extra benefit of high-mileage oils:
- More rapid rate of engine wear - Extra anti-wear additives to reduce friction
- Extra detergents to reduce deposits - Extra detergents to reduce deposits
- Contain special seal conditioners to help leaks - Contain special seal conditioners to help leaks
- Extra anti-wear additives to reduce friction - Extra anti-wear additives to reduce friction
Let's align the symptoms with benefits more clearly:
- More rapid rate of engine wear → Extra anti-wear additives to reduce friction
- Build-up of deposits → Extra detergents to reduce deposits
- Oil leaks due to worn seals → Contain special seal conditioners to help leaks
- Increased friction and metal-to-metal contact → Extra anti-wear additives to reduce friction
Please note that some categories can overlap based on their functions, but this provides a general matching of symptoms to the benefits of high-mileage oils.