I have a 2003 Chevy Blazer with 107200 miles on it. I have notice that I had an oil leak. I don't really want to tear it apart to replace the seals. I have put in Mobil Super High Mileage this past May in at the last oil change about 4500 miles ago. It had stopped leaking but now its leaking again. Do you think I should put the same oil back in? Go to 5000 miles or more? Do you think by switching, it stopped leaking and what would got it to start again? Any advice?