I'm going to be putting in an eaton posi in another week or two in my GN. I was debating on going with synthetic or regular gear oil. I'm not very concerned about the price but about leaks. I had heard Some cars seem to leak forever with synthetic gear oil. I will be installing all new seals at the same time. Is there truth to the myth, should I stick with regular gear oil? I will be re-using my stock gearset and axles which has a whopping 26,000 miles on them. I'm looking for reliability mainly. I hate having stuff break or discovering problems all the time.