What is the average lifespan of the Audi A6's engine and what maintenance is recommended to extend its lifespan?

I am considering purchasing an Audi A6 and would like to know what to expect in terms of the engine's longevity. Additionally, I would like to know what maintenance is necessary to keep the engine running smoothly for as long as possible.

The average lifespan of the Audi A6's engine is around 150,000 miles. However, with proper maintenance, it can last up to 200,000 miles or more. To extend its lifespan, it is important to regularly change the oil and filters, use high-quality fuel, and follow the manufacturer's recommended maintenance schedule.