What will high mileage cause to a vehicle?

The main impact of high mileage is on the engine. High mileage essentially means high usage. And high usage mean high wear and tear. All this means that engine servicing is important. Oil must be changed frequently, and it is better if you use a high-mileage oil. You will have to check on the seals of the engine as high mileage can result in corrosion. The oil pump must be checked too.