The Wärtsilä 8L20 generator set is a popular choice for power generation in various industries. However, like any other machinery, it is not without its problems. One of the most common issues reported by users is the high consumption of spare parts, particularly in engines running on crude oil. This can lead to increased maintenance and operational costs, which can significantly impact a company's bottom line.

Another problem that has been reported is the high pollution rates associated with the use of crude oil in the Wärtsilä 8L20 generator set. This can have a negative impact on the environment and can also lead to regulatory compliance issues for companies using this machinery.

Additionally, some users have reported issues with the performance of the engines at different loads. This can result in decreased efficiency and productivity, which can further impact a company's operations.

To address these issues, Wärtsilä has introduced several upgrades and new features in their engines. For example, the upgraded Wärtsilä 20 engine comes with a new automation system including a touch screen display, and a new wastegate with hydraulic actuator. These features are designed to improve the engine's performance, efficiency, and reliability, while also reducing maintenance and operational costs.

Furthermore, Wärtsilä has introduced a new KBB turbocharger version ST5 EP (8L20) which is designed to improve the engine's performance and fuel efficiency, and reduce emissions.

In conclusion, while the Wärtsilä 8L20 generator set has been known to have some problems, Wärtsilä has taken steps to address these issues by introducing upgrades and new features. These improvements are designed to enhance the engine's performance, efficiency, and reliability, while also reducing maintenance and operational costs. Companies using this machinery should ensure that they are utilizing the latest upgrades and features to maximize the benefits of this generator set.