I have a question regarding the chemistry of the new Pennzoil Platinum Pure Plus oil. I recently changed the conventional oil out of my 205k mile 2005 Honda Pilot and refilled with the new formula Pennzoil Platinum. Prior to this change, there were no signs of any leaks coming from the engine. Within a day the rear main seal developed a considerable leak. Significant enough that I parked the SUV until I had time to replace it this weekend. The old seal did not show evidence of excessive wear or damage, and the crank is in great shape. The motor is again drip-tight with the new seal. Is it the change in chemistry that could have caused the rear main seal to leak?