if its a 3.1 it takes 4.5 quarts with filter.
it is always best to use the dip stick to ensure the best results...
About 5L
5 Quarts
Should take 5 qts. with a new filter.
4.5
Attached to the engine block inside the oil pan.
under the engine Bottom of the oil pan.
if it has a 4 cyl. ecotech it takes 5 qts.
raise front off car, filter is left of starter on 3.1,get a oil filter wrench to take off.
you take some out.
The 2001 Elantra take 4.5 qts with filter change
Its right above the oil filter. Its easier to remove the oil filter to get to it.
most all cars take 4 liters,assuming you just gave it an oil change.If not check your dipstick to see how low you are.