Just picked up a well maintained '85 Camry with the 2.0 gas engine, 93K miles. The manual specs anywhere from 5W-30 to 20W-50 depending on ambient temps. Here in Las Vegas we will be starting our HOT season soon, up to 120 degrees F. What say you? How about GC 0w-30, as it is almost a 40wt from what I understand. 20w-50 just seems a little thick to me. The manual specs 5w-30 only for cooler temps. No idea what the previous owner ran in it, and it has a pro-line filter on it right now. I will be running OEM filters if that makes a difference.