Originally Posted By: Danh
Some seem to think once seals have been conditioned with MaxLife, going back to a conventional, non-High Mileage oil will result in shrinking seals and again, more leaks than there were at the beginning. Again, has anyone seen this?
This has not been the case in my experience. I have run a few OCIs of MaxLife 5W-20 (the NextGen variety, for what it's worth) in our 2008 Honda CR-V, with fewer than 70,000 miles, and I now have Pennzoil Platinum 0W-20 in it and there are absolutely no leaks. Granted, I didn't run the MaxLife for 100,000 miles and then switch to something else, but in my limited experience, I have not had any leaks when switching back off it.