Complex sentence: Following the acquisition of Petro-Canada, Suncor decided to phase out the Ontario-only Sunoco brand in favour of converting their Sunoco sites to Petro-Canada sites in order to unify all of their downstream retail operations under the Petro-Canada banner throughout Canada.
Split into simpler sentences: Following the acquisition of Petro-Canada, Suncor decided to phase out the Ontario-only Sunoco brand in favour of converting their Sunoco sites to Petro-Canada sites. This was done in order to unify all of their downstream retail operations under the Petro-Canada banner, throughout Canada.