Simplify the following text for a Grade 5 native English-speaking person.
Original: The Toyota B engine series of diesel engines varies in displacement from 3.0 - 4.1 L. The largest engine in that series was used in the Mega Cruiser .
Simplified: They often exceed 3.0 L. Toyota made a 4.1 L diesel engine that was used in the Toyota Mega Cruiser .