Okay, it took me about 10 minutes but I found it. I have a 1994 Buick Regal & my oil filter is on the back passenger side of the engine, about 3/4 of the way down, below the Power Steering box. I hope that helps! On my 1991 Buick Regal the oil filter is located under the power steering pump which you access through the passenger wheel well to remove/add the filter.
Look at the rear of engine right side
Under the car on the rear of the pass side of the engine.
The Oilpressure switch is located near the oil filter, just upper side with the electric wires plug in
It's located next to the dip stick you wil need a 1 1/4 socket to remove it
4.5 qts. with a filter change
No, you do not have to remove the wheel/tire.
The Oil filter is located between the behind the Radiator and the Lower front of the engine
on the oil pan
Buick big blocks have the oil filter located directly below the distributor, just outside and behind the lower pulley.
The oil filter on the 1995 Buick Park Avenue is located on the driver's side in the engine compartment. The filter is close to the firewall on the driver's side.
4.5 Quarts, with replacing the oil filter. Start, check, and top off as needed.
If it has the 3800 engine, it will be located on the passenger's side, inboard of the wheel, and mounted just inside the frame between the mount points for the control arm for the suspension.