Can you use synthetic oil in a 2005 Subaru Outback?

Answer 1

I have been using Mobil 1 in my 2002 Outback for the last 50,000+ miles. The first 15,000 or so I used a good conventional oil to break in the engine. I have not experienced any oil leaks or engine problems and I beat on my car mercilessly. I used to work in an oil laboratory in the US Navy and synthetic oil beats conventional in many ways. First of all it can run at much higher temps without burning and producing sludge. It has better coating and penetrating properties. It will also have a better thermal operating range as far as viscosity is concerned. I change my oil every 7000 miles and the oil still coats the sides of the container like it was new with a nice even layer. So I say go ahead and use Mobil 1 but some other oils that claim to be synthetic technically may not be. Another great oil is called Royal Purple that a friend of mine used in his STI. I would never go 7000 miles with a conventional oil though especially if the car is turbocharged.