That sounds like an interesting concept for a trailer mod in FS25! Having a larger tank capacity of 150,000L would allow players to transport more goods or resources in a single trip, increasing efficiency and reducing the need for multiple trips.
Additionally, the fast fill/unfill rate of 10,000L per second would save players time by quickly loading and unloading the trailer. This feature would be especially useful for players who need to transport large quantities of goods in a short amount of time.
Overall, these enhancements could make gameplay more enjoyable and convenient for players looking to streamline their transportation operations in FS25. It would be great to see a mod like this added to the Bigger Trailers Pack v1.0 or as a standalone mod in the future.