Sounds like the "Spirits" are telling you something.....I would take it elsewhere. Imagine the hassle you'll have if you have a problem. Better to "establish" yourself as a regular customer with a dealer that will go to bat for you, if you ever have a problem.
I was tempted to go with the "spirits" but I wound up going to the local dealer instead, and had a happy outcome.
Got my oil changed in an hour, for just under $50. Kind of pricey, but considering the cost for synthetic, and the typical dealer markup cost, not outrageous. I might go back to doing my own oil changes in the future though.
When the folks who answer the phone at the service number for my local dealer first told me that they couldn't work on a PHEV, I was flabbergasted because I knew that they sold them. So I posted a somewhat critical review on Google for the dealership. It elicited a prompt response from the dealer's customer relations department, suggesting that I was mistaken and they certainly did work on PHEVs. That motivated me to call a second time and try to schedule an appointment for an oil change. Initially, the person who answered the phone told me once again that they aren't certified to work on plug-in hybrids. And then after I explained that a plug-in hybrid is not an EV, he set up the appointment.
It didn't leave me with a lot of confidence, because you shouldn't have to explain that to a service writer, but when I arrived there this morning, I met a completely different service writer who didn't need to be educated on the different Niro "flavors" and all indications are that they did a decent job: new oil is clear and at the perfect level on the dipstick, everything seems in order under the hood and under the car, etc.
If I hadn't posted a complaint against the dealer that was sufficient to antagonize their customer relations team into a response, I would have believed what I was initially told, and would have wound up on a two hour round trip for an oil change at the next closest dealer. Sometimes, complaining publicly has benefits!