Take the kick panel on the passenger side, right below the glove box, off and then look up and you should see what you seek.
Look on passenger side rear of engine
under the dash behind kickboard on passenger side.
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.
Where is the power steering fluid for a 1997 Buick Regal LS 3.8 liter engine?
The 2014 Buick Regal is 6 ft. 1.1 in. (73.1 in.)12V front power outlet(s) wide.
The 2012 Buick Regal is 6 ft. 1.1 in. (73.1 in.)12V front power outlet(s) wide.
The 2002 Buick Regal is 6 ft. 0.7 in. (72.7 in.)1 one-touch power windows wide.
The 2013 Buick Regal is 6 ft. 1.1 in. (73.1 in.)12V front power outlet(s) wide.
The 2003 Buick Regal is 6 ft. 0.7 in. (72.7 in.)1 one-touch power windows wide.
The 2011 Buick Regal is 6 ft. 1.1 in. (73.1 in.)12V front power outlet(s) wide.
The 2004 Buick Regal is 6 ft. 0.7 in. (72.7 in.)1 one-touch power windows wide.
The 2001 Buick Regal is 6 ft. 0.7 in. (72.7 in.)1 one-touch power windows wide.