[20Bluezl1]

So i have read alot of post and I'm confused. I'm trying to figure out what is the difference from mobil one 0w-40 dexos 1 vs dexos 2. I look at my manual and it specs out for 0w-40 dexos 2,but I took it to my dealer to get my free oil change and asked them what oil they where going to use and they told me 0w-40 dexos 1 because that is what the vin# pulled up.

So my question is can they use dexos 1?

And from now on I'm changing my own oil and filter, what oil should I use and filter?

Sorry for the long post and also another oil thread.