Not accepting this one either way BUT if Ingall were to leave Perkins and Perkins isn't delivering the goods - Castrol may not see them as the team to stay with.
Anyway - my little garden gnome told me that Bowe and INgall are going to team up in a unique Ford and Holden team (Ingall in the Ford) and CAT will sponser Bowe in the Holden and Castrol the Ford.
Go figure - April 1st is still 6 months away yet!