What's with Motorcraft Mercon V? The local stores (NAPA, Advanced, O'Reilley's, Walmart) have it only in quarts at about 8 bucks each. I need two 5 qt jugs but Amazon is the only place I see it and that's even more expensive. The parts stores say they can't get it. ebay is the best price at $5.57 a quart but I have to buy it in 6 quart cases.