Hello all! I have an 01 Ford Ranger (SOHC 4.0) that has what appears to be a "slight" (doesn't leave spots) rear main seal leak and I'd rather not pay $700+ to have it fixed. I've been running Mobil 1 High Mileage 5w-30 for about 20k, so I doubt that's going to solve the problem. Is the Liqui Moly product any good, or is there anything else you fine folks would recommend? Next month I've got a 10 hour road trip (Louisville KY to Destin FL), so I'd like something I could just dump in and forget about. By the way, I just changed the oil so I'd rather not fool with something that I'd have to dump after 500 miles. As always, thanks for any help!