I purchased Pennzoil Platinum for a old honda odyssey that had about 130k miles on it. Due to less than stellar maintenance there was some deposit build up and when I switched to platinum it cleaned out all the junk quickly but left the old seals now exposed and likely more brittle than they should have benn. Anyway after the cleaning the seals started leaking to the tune of about 5 or 6 nice drops each night. I replaced the v tech seal and it stopped that leak but the oil pump leak continued. I switched to pennzoil high mileage and after only a few weeks it has slowed to only 1 drop every 5 days or so and I suspect it will stop all together. Please understand platinum simply cleaned out the junk leaving the old seals that had been hidden dry behind junk to leak but thats not platinums fault its the fault of the lesser oil and longer change interval that was used previously. long story shorter pennzoil high mileage slowed and will likely stopped a leak for me.
