Many places do not give enough time for the oil to drain completely out when they perform the oil change.
They then fill it right back up using the listed quantity, and do not give enough time to wait for the oil to settle before checking the level.
These two things combined can lead to a slight over-fill. Not enough to do any damage, but could cause the oil to read over the full line.
Unfortunately, the only way to ensure it is done properly is to do it yourself or watch them like a hawk when performing the service. If you are going to a 'quick-lube' or drive-through type place, they perform the entire oil change in less time than I let mine sit to drain all the oil out!
They then fill it right back up using the listed quantity, and do not give enough time to wait for the oil to settle before checking the level.
These two things combined can lead to a slight over-fill. Not enough to do any damage, but could cause the oil to read over the full line.
Unfortunately, the only way to ensure it is done properly is to do it yourself or watch them like a hawk when performing the service. If you are going to a 'quick-lube' or drive-through type place, they perform the entire oil change in less time than I let mine sit to drain all the oil out!
