I called Mobil 1 customer service today and was told that Mobil 1 OW20 is not bottled in a 5-quart or 5.1 quart container at this time. They plan to bottle only quarts for the time being.
I'm assuming that the 2012 FB25 Forester and the 2013 FB25 Outback use the same (factory) oil filter. If correct, has anyone cut open the new filter? I'm interested in what you found.
Rand,
I’m not an expert or even well versed in engine oil, but my understanding is that viscosity is resistance to flow. Wouldn’t the lower number mean that M1 would flow more quickly?