That reminds me, I too also was reading that the owner's manual says to drain the oil, put the plug back in, add the correct amount of new oil, then replace the oil filter. This is how I did it the first two oil changes I had the truck, then just last night I totally forgot about doing it that way, cause at the same time I was changing the oil on my aunt's Grand Cherokee. I drained the oil, put the plug back in, took the oil filter off, and as soon as I went to get a rag to clean the oil filter head, I remembered, and went "Oh SH$T!" I just winged it and put some new oil in the new oil filter and screwed her back on hand tight. Put in 5 quarts, plus a can of that Engine Restorer, and then ran the motor, checked for leaks (none of course), turned off the motor, waited, checked the oil level, added the 6th and final quart, and called it quits.
Did I do something that might've screwed with the oil pump?

I don't think I did, she still drives, and runs.
__________________
Pat Albaugh, Midwest Moderator
"Diffage" -the point at which the truck's differential makes contact with the ground.
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1995 RRC LWB
-LT265/75R16 Pathfinder All Terrains
-RTE 2" Lift Springs
-Pro Comp ES9000 Shocks (from DAP Enterprises)
-KMC Front Diff Guard
-4 Desert Fox 55 watt Lighting
-Radio Shack CB Radio (never know when signal fails on a cell phone)
-2 Halogen Super Sport 100 watt forward lights
-Custom slim style front bumper w/ integrated bull bar
-Lowe's Special "Homemade" Snorkel
-T-Case out of an 92' RRC