Hello, I have a question for everybody. I have a 2005 Tacoma with 180,000 miles. I do oil changes on my own, and I have stuck by the manual using 5W 30 which is recommended by Toyota. Lately I've noticed about 300to 400 miles into a new oil change, the oil level has dropped significantly. It usually gets to the point where I'm adding 2 to 3 quarts before it's time to change the oil again. I'm lucky if I get 3000 miles before I have to completely change the oil again. My question would be, should I go to a thicker viscosity oil weight? I'm in Southern California so the temperatures never get cold, but it does get warm in the summer. Thanks in advance.