The 2001 Buick Regal needs oil added if the level of oil on the dipstick is at or below the Add mark. Checking the oil at every stop for fuel is good practice to catch major leaks early.
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You have an oil leak.
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.
A 1992 Buick Regal 3800 needs approximately 4.5 quarts of oil. The oil can be purchased at any auto parts store such as NAPA.
As soon as the 2003 Buick Regal change oil light comes on, it is important to do so immediately. Not changing your oil can damage the motor in your car.
4.5 qts
You can prime the oil pump on an 85 Buick Regal by removing the distributor and inserting a priming rod onto the oil pump shaft. It can then be turned by hand or with a drill to distribute oil throughout the engine.
10w 40w
On My regal the Cat is located under the car a little bit back from the oil pan. But mine is a 2001 so if its not there on yours, it might be connected to one of the exhaust manifolds.
5w20 any major brand.
5 quarts
5w30 when its cold and 10w30 when its warm