First time Subaru owner here. I know that the new FB engines "require" full synthetic oil and was recently in my local Subaru dealership picking up some touch up paint and I noticed that Subaru has their own branded full synthetic motor oil. I believe it is made by Idemitsu. I asked the parts guy about it and he didn't know that much about it. I asked if they use the Subaru brand or other full synthetic for oil changes and he said it varies from dealer-to-dealer, but they also carry Mobile 1.
I use Mobil 1 exclusively, mostly because it's readily available and priced well. I would like to get some feedback to find out if the Subaru branded 0W-20 in the gold containers is a better alternative than the Mobil 1?
I know there are lots of discussions on who makes the best oil and that's not what I'm asking for. I'm just trying to determine if it would be better to go with the Subaru branded synthetic or Mobil 1 when I get my Forester serviced for oil changes since that's what the dealer carries.
I don't know what kind of experience Subaru owners have had with the Mobil 1 in the 0W-20 weight since it's been out longer than the Subaru branded synthetic?
Thanks for any objective replies.
I found this information about the two oils:
SAE Grade 0W-20/0W-20
Viscosity @ 100ºC, cSt (ASTM D445) 8.466 /8.7
Viscosity, @ 40ºC, cSt* (ASTM D445) 44.77 /44.8
Viscosity Index na/173
Sulfated Ash, wt% (ASTM D874) na/0.8
Pour Point, ºC (ASTM D97) na/-50
Pour Point, F na/-58
Flash Point, ºC (ASTM D92) 200/224
Flash Point, F 392/435.2
Density @15.6º C g/ml ASTM D4052) 0.89/0.841
Zinc/Phosphorus .065 /na
I have been using Mobil-1 in my old British cars and in my 21st century cars as well. I find it to be a reliable, excellent oil.