Selecting the correct gear for the conditions and not lugging the engine would help to avoid this also IMO. LSPI still seems to be mysterious from my short research on the subject. The fact that your lubricant can help with this is interesting.
You mention the Shell brand but my dealer uses Caltex.
HAVOLINE PRODS F SAE 0W-30 is what I am told they will use in the N.
Do you have any insight into this?
Does anyone know what the initial fill of oil is at time of manufacture?
Update: The aforementioned engine oil arrived at the dealership some 3 weeks after my initial enquiry to have the oil changed. While this was not ideal, I managed to book the car in at a time suitable for me and the oil and filter and drain plug gasket were all changed / checked and job done.
The service manager was very flexible with a time / day to carry this out and without any word from me regarding any earlier inconvenience I found I was not charged any labour whatsoever.
Result: $93.05 inc GST which covered the oil / filter / drain plug gasket.
This was a perfect result to my mind for both the dealer and myself.
Reynella Hyundai have a very happy i30N owner who is happy to broadcast this experience as seen here to anyone who cares to listen.
The customer (me) feels the dealer has met my expectations and needs in this case and will continue to patronise the dealership. Everyone WINS!
There is some research on how much money it takes to attract a new customer compared to how much it takes to retain an existing customer. The difference is significant without citing the research. Take into account advertising costs and time to attract the new customer versus maintaining the existing one. This is well known in industries that sell high value products that require on-going maintenance.
So this is a big thumbs up to Reynella Hyundai in South Australia. If you are a SA owner and require i30N service (or any Hyundai model really) I have no complaints. Tell them the owner of the MG i30
N recommended them. They have only sold one MG so they will know who.
( I have not been asked or paid by Reynella Hyundai or Hyundai Australia to make any of the above statements and observations.)

I am disappointed by the outrageous charges some eastern states dealers appear to be charging for the same service however.
I am not trying to "rub it in" to those customers either. I am just stating my experience only.
Happy New Year to all N-cars.net members.