Should I start Hillis this week?

My current starters at RB are Peterson, Thomas Jones, and Chris Johnson. Obviously, Peterson stays, but Jones and Johnson draw each others' defenses this week, which are both pretty tough. Jones has been tearing it up, so I'm thinking he stays, but what about Johnson? He's been struggling. Is it worth giving Hillis a shot?? He's up against Oakland, so he can't do too bad, right. What do you guys think, Hillis or Johnson?