Wrong size filter for the engine, filter too tight or too loose, filter has a hole in it, or gasket not oiled before installation thus causing it to leak. The old gasket could have been left on the engine thus causing a leak with 2 gaskets installed.
Simple answer really is that you have the wrong oil filter. Look for a WIX oil filter (personal recomendation), you can get them at O'reilys. And see what happens.
wrong filter with wrong thread pattern.
Normal, you get a little blow back from the PCV valve system...
A bypass oil filter has a valve in it. When the filter media plugs up, the valve open and the oil bypasses the oil filter. It prevents extreme pressure buildup in the oil filter that could blow out the media. Also, many engines use a bypass oil filtration system where only a portion of the oil goes through the filter at any time. All the oil eventually gets filtered.
Remove the oil filter and then remove the extra o-ring that's STUCK up in the engine block were the filter seats against. It should ONLY have ONE O-RING and that will set on the top of the oil filter.
225 slant six engine? Could be a leaky oil pressure sending unit located just below the oil filter.
Chances are you are using engine oil with a high vapor rate. The vapor, by way of the PCV valve, is being returned to the intake causing the oil on the filter. Change your filter more often or change the brand and/or grade of the oil. Let me guess? Its a 2.5 , Rings are worn creating excessive blow by in crank case.
Some oil filters have a check valve in them. Perhaps you have the wrong filter on the car? Your car may not take the filter with the check valve. Also check to see if someone who did the oil change didn't leave the old oil filter rubber ring on the housing and then installed the new filter on top.
YES! Never change the oil without changing the filter. Not changing the filter will save you what, 5 bucks. Replacing the engine that you will blow in the process will cost, maybe $800 to $1200. Do the math then go out and CHANGE THE FILTER. Put an air filter in it while you are at it.
Neither your oil filter, or the fill cap need to be loose, the filter should be screwed on as tight as you can get it by hand only, and the fill cap should fit snugly so it does not come off. If the oil filter is loose or too tight you can blow out the seal which will cause you lose all your oil.
breather tube from crankcase or valve cover brings blow-by to the air cleaner to reburn. excessive blow by will be heavy with oil in the air.
Installed incorrectly as in cross threaded. Could also be that the filter was defective.