Acura TLX 2021 Owner's Manual page 537

uuMaintenance Under the HooduOil Check
2.0 L engine models
Upper Mark
Lower Mark
3.0 L engine models
Upper Mark
Lower Mark
536
4. Remove the dipstick again, and check the
level. It should be between the upper and
lower marks. Add oil if necessary.
1Oil Check
If the oil level is near or below the lower mark, slowly
add oil, being careful not to overfill.