Hi guys new to your site hope you can help. Just bought a 2012 Camry 2.5 (4 cyl). I like to do my own service work even though they will do it for free for first 25,000 miles. The manual calls for 0w-20 oil and if you use 5w-30 to replace it with the 0w-20 on the next oil change. They also recommend it be changed ever 10,000 miles. My questions are 0w-20? this is very thin oil, can I go up to 5w-30 all the time?, I live in Maryland the climate is not that cold in the winter. Also is this a synthetic oil ? I like those they seem to make the engines last longer. If not what do you guys recommend? Thanks,Andy D.