In what year was the album “Petrolea” released by Siddharta?

In what year was the album “Petrolea” released by Siddharta?: The album “Petrolea” was released in 2006 by Siddharta, featuring 10 tracks.
What is the most successful song from the album “Petrolea” by Siddharta?: “Ohm” is the biggest hit from the album “Petrolea” by Siddharta.

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