[07cajuntitan]

I used to be a die-hard 10W-30 fan & user regardless of what the manufacturer said. In Louisiana it rarely drops below freezing temperatures so I figured it was fine. I used Mobil 1 full synthetic 10W-30 in my 2002 Silverado ever since it hit 5000 miles, and changed it religiously on a 5000 mile OCI. It started burning a quart of oil between oil changes at about 60000 miles and continued until I traded it in on the Titan a few months back. I don't know if it was the oil, or the Chevy engine, but I am going with Nissan's recommendation of 5W-30 with the Titan & will keep everything else the same. We'll see what happens.