Just bought the wife a new 2018 Toyota Avalon, Touring trim level (sweet ride!). I was wondering if these come with syn as factory fill now or if it is still conventional. My local dealer said oh we think it's syn, wait a minute, it is or it isn't! How can you not know, you are the dealer! Nevertheless, they couldn't say definitively, or at least the person in service I spoke with. I tried searching first but was unable to find it. Has anyone done a VOA of the Toyota syn recently? I figure the car came filled with syn but I wanted to know for certain because knowledge. Thank you in advance for all ye who are more knowledgeable than I about this particular subject!