0-20 oil is very thin. It is
0-20 oil is very thin. It is only used to increase gas milage.
If I owned a Subaru I would switch to 5-30 and see of that runs through the motor as fast. I bet it will not.
If it still burnt oil I would try 10-40.
What's the sense getting better milage if it's costing you a fortune in oil costs..........