One problem related to engine burning oil has been reported for the 2008 Subaru Impreza. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Subaru Impreza based on all problems reported for the 2008 Impreza.
Smoke coming from the exhaust, rough idle, oil consumption were my first signs. The dealer wouldn't do a compression check on the motor since there was no check engine light on, so I had to pay with my own cash and take it to a private shop and found out that in fact cylinder #2 had a shot ringland. They replaced the piston but the motor doesn't seem to be right still since I have a car that was involved in a "stop sale" that involved some engines having some debris in the motor and was causing knocking and throwing bearings. Subaru should have replaced the short block but didn't.