FL5 comes with ServicePass so just work with whatever oil they use during that service but Signature series exceeds the requirements that Honda set for its oil.Owners manual says API certified. Amsoil signature series is not api certified. I know you work at a dealer- any cause for alarm or voiding of warranty?
Yeah, that’s totally understandable. In the event of an engine problem, Honda would definitely want records of your oil changes, which would show what you had put in the engine. API or not could be a point of contention. I think @AspecR has the best advice. Maybe by the time your ServicePass period has run out, Amsoil will have gotten the Signature Series API certified. They’re losing potential sales by not having it I think.
The cheapest bulk oil they can find.Driver's manual recommend 0W-20.
What brand the Dealership use ?
I've heard that the honda oil is actually pretty good, but I believe that was from some japanese video from spoon.The cheapest bulk oil they can find.
Motul 0W-20 Oils | TBN | Flash°C | SA% Density | KV40 KV100 | VI HTHS | VII | HTFS | KV150 DV150 BO KV40 BO KV100 | ||||||
8100 ECO-LITE | 8.4 | 223 | 0.84 | 0.842 | 45.0 | 8.4 | 162 | 2.6 | 4.94% | 1.90 | 3.74 | 2.89 | 29.63 | 5.53 |
8100 ECO-CLEAN | 8.0 | 226 | 0.80 | 0.837 | 38.5 | 8.0 | 187 | 2.7 | 2.43% | 2.26 | 3.70 | 2.84 | 30.67 | 6.37 |