Salam.
First of all, congrats on a new ride:)
When the time came to change oil in our Swift, i bought a pack of Liqui Moly.
Went to the dealership and told them i brought my own engine oil and all these mechanics came like hyenas and told me warranty, engine failure bla bla.
Went straight to the manager and asked him, he said use any oil nothing happens. Warranty doesn't get void. That's for Suzuki, idk about Toyo and Honda.
PS: used LM Synthoil 5w-40 and today i've driven more than 5000km on LM, and the colour is Goldenish/brownish. Not dirty YET