I agree with the side of continual use of MaxLife for the year. I didn't know about the 3 OCI bit after switching oil brands...makes me wonder.
If after that you choose why not go to Rotella T6 only and if the leak returns, THEN try adding the additive as an experiment? If it fails, your alternative is returning to the cheaper MaxLife.
Oh, and if you haven't already, you can get 3 of the 5 Quart jugs and qualify for a $15 rebate(basically giving you one jug for free).
It brought our price for 15 quarts down to $1.58 each.
Additionally, I typically use MaxLife when converting high mileage engines over to synthetic, or just for a good cleaning. I like the product.