N55 is not supposed to have LL14 oil in it. I'd take it back and demand a re-do.
https://www.newtis.info/tisv2/a/en/f...supply/1PSryV8
edit - OK I read a little better. I would have a very hard time trusting "they definitely wouldn't have actually gone and got 0w20" and it actually has the right oil in it.