I tried with penetrating oil, I tried with a hammer to loosen it, it wouldn't budge. This really pissed me off since I took the time to put the front two sides on jack stands. Granted, I don't have a torque wrench, but I never needed one in the past to get that bolt out on any other car, think Valvoline over-torqued it? I checked a few websites that said torque wrench optional. I don't know if the Rav4's a special case and you can't get around that or not. I don't have the money to buy an impact wrench for the next few weeks but I plan on it. I'm just curious why it's so tight. I got the plug off really easy when I did the transmission fluid. Is the transfer case and differential as hard to turn as the oil drain plug?