Good point. I plan to have the oil change done at 1 year for my PHEV (which will probaly have 7k engine miles at 1 year). Probably not by the dealer because frequently, when i send my car to a dealer (RR or Lexus), it seems to come back with some new problem! Riskiest have been the 30k and 60k service on Lexuses - it seemed like they invent the a problem or cause a problem! BMWs never had such an issue, post service - interestingly so because the maintenance is free for 36 months on the BMW.
I had a perfectly working RR and when I sent it to the dealer at 10k miles (I dont recall why) - soon after I got it back, I had the issue of "loss of drive". It was working fine for 10k miles and right after visitting the service/dealer, it has a serious issue? Coincidence? It might not have been wilful negligence. It is not just range rover. Over the past 30 years, I realized that cars work best, as long as they don't need dealer service, and as long as I dont take them to the dealer for the 30k or 60k service! Just change the oil and air filters keep going!
I prefer to have my cars oil change done by my (known) local mechanic. I buy the filter from the dealership; this way, there is a record; also there is a record at my local shop. I believe that the filters sold by mechanis/oil change centers would not be as good. I might take the Castrol oil also for RR. We dont know what type of bulk synthetic, the mechanics buy (probably the cheapest kind? ).