this is a crazy amount of oil to consume. my wifes 2011 forester has the 2.5 liter version of the impreza 2.0 engine. since new it has consumed no oil.thats 21k miles soo far. my 08 wrx is pretty heavily modded and over 4 years old and 46k miles. it consumes no oil either. did subaru have any answers as to why the consumption issue??