OK, so like a good boy I'm changing my own oil...went to Autozone and used their book, and got the appropriate oil filter - ACDelco Professional PF 1218...... Went and fought for a while to get the old FRAM filter off...but once it was off, they didn't look the same. More looking and the threaded area wasn't close, and I got hot. Went online...did some parts number comparisons...I had a Fram PF 3980 on the truck. It does have the oil cooler on it. So since I had to go to Walmart to get a new battery replaced (only had it since Feb and it ran down and died)...figured I'd get one there. Ended up with the Xtended guard PF3980 (gold box)....and I also grabbed a ACDelco PF 52E. I had wrote down a ton of other comparable filters off Fram's site (who said the company was all bad?? ).... And worst yet...when I went to search for the filter I got that was 'too big'...its listed for the same vehicle as well (got that off Summit Racing's website). So has anyone else had any issues when it came to getting oil filters ?? What's the overall best decision to get ? I'd have grabbed a WIX but didn't see one.