Hey everyone. My girlfriend has a 2007 Scion tC that currently does not consume/burn any oil with 5W-20 (it has 88k miles) in a 5k OCI. I guess she should be considered lucky at this point. Moving forward, I'll be taking care of her car to prevent this issue from happening for a relatively long time. It seems Pennzoil Ultra Platinum has the best cleaning properties, but it seems even Pennzoil dino oil isn't too bad with cleaning either. What should I do for the best bang for buck? She doesn't drive the car much and it's mostly short trip style of driving which makes me think dino oil would be the best, but from research it seems dino oil is the reason why these cars clog the piston oil returns.