Purchased a 2021 Ram with 5.7 4x4 Big Horn, with off road package about 2 months ago. Bought it with 35k miles from a Chevrolet dealer. Like most times, the dealer serviced the truck and did an oil change. After 2 months of normal driving and a 1800 mile road trip everything was fine and I was quite happy with the purchase. The weather turned cold and I pulled the truck out of my carport to work on an ATV somewhat out of the weather. After an hour I went to get a flashlight out of the truck and noticed about a half a quart of engine oil on the ground. I climbed under to see what the hell happened, and the oil filter was loose. I tightend it up and got about a turn and a half on it. They had installed an AC Delco PF 48 oil filter, which is not the correct filter. It's supposed to be a PF 48B (I think). Took it to a local shop and had them look at it and change the filter. The mechanic looked up the filter and said although the filter is not the correct one it should still work. My question is (after a stupidly long explanation), why did the filter start leaking after 2 months and over 2000 miles of driving? It was the first time that I can recall I didn't fully get the engine up to operating temperature after starting it. Normally if a loose oil filter is going to leak you'll notice it after first start up , there was not a drop of leakage where I normally park. The oil level was in the normal range before (checked before road trip) and about half a quart low after leak. Any thoughts on this issue?