I have found that no matter how many times I replace the rear main seal, there seems to be at least a few drips on the ground at car shows from the rear main seal...I haven't figured out a way yet, and neither has the manufacturers to get a two piece rear main not to leak a few drips...Pouring out a quart for every 5 min. of idle time is another thing altogether though...Rpelacing seems to slow it down for me...