Buick 1994 LeSabre Owner's Manual page 223

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.
The engine oil dipstick is directly behind the engine fan.
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.
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