Hi Burty,
You just need to be mindful they don't always use what we would call "manufacturers fill".
Yes you can use the Total Oil from parts as a top up, but most, not all dealers, buy in bulk and will use a generic A2/C2 oil from a major supplier. It could be Castrol, Total or even Morris Oils, Millers for instance.And not all these oils are approved, they may meet the requirements, but not approved there is a difference.
They have a lot of vehicles to service all requiring different oils they would need a warehouse the size of a tennis court just to store their oils.
I'm not saying its wrong, but it won't be the first time a dealer has serviced a car and not used the recommended oil.
Edited by: uncletone