Buick 1994 Century Owner's Manual page 216

The 2.2L L4 engine oil dipstick is located in the fill cap
near the front and center of the engine compartment.
Turn off the engine and give the oil a few minutes to
drain back into the oil pan. If you don't, the oil dipstick
might not show the actual level.
To Check Engine Oil
Pull out the dipstick and clean it with a paper towel or
cloth, then push it back in all the way. Remove
it
again,
keeping the tip lower, and check the level.
214