I had no idea about Mercon LV turning brown so fast. However, they didn't officially use Mercon, they used a Multi-Vehicle. Now whether or not that fluid (which is "recommended" for Dexron VI, Mercon, Mercon LV etc) turns brown just as quickly is the real question. I guess I'll find out in the future. After the 3rd drain and fill I'll wait 5,000 miles and see what color the true Mercon LV is.