Complex sentence: In 1968, Castrolreleased a film called "The Flying Finns", it featured the 1968 1000 Lakes Rally and concentrated on documenting the duel between Mäkinen and Hannu Mikkola.
Split into simpler sentences: In 1968, even a Castrol-produced film called "The Flying Finns" was made. It consisted of the 1968 1000 Lakes Rally and concentrated on documenting the duel between Mäkinen and Hannu Mikkola.