Well, Subaru has put out a "Caring for Subaru Turbocharged Engines" bulletin. Broken down to the nuts and bolts, it says this:
Engine oil and filter:
Proper lubrication of the turbocharger requires high-quality engine oil. Some do not provide enough lubrication. The Subaru Genuine oil filter is the only filter that has tested to meet requirements for filtration and flow. Aftermarket filters may have different filtration performance and relief-valve opening pressure.
Engine Oil and Filter Replacement Interval:
Under normal driving conditions, the recommended oil and filter change interval for turbo engines is every 3750 miles of 4 months. For vehicles driven in conditions beyond normal, such as racing conditions, the oil and filter may require more frequent changing.
Racing Type Driving:
Racing type engins stress doesn't only occur on the track. Racing-type driving occurs when the drivetrain and suspension are used near peak capacity. Any driving where the engine speed is kept high is considered racing-type driving. IMPORTANT: A track day or AUTOCROSS event requires an oil and filter change immediately before and immediately after the event. Make sure to check other fluids as well.
Engine Oil Level:
Check your damn oil stupid! (my words, not theirs, but you get the point)
Oil Changes:
Carbon deposits produced by a turbo engine can accumulate at the bottom of the oil pan. When changing the oil, always drain the oil through the oil pan drain plug.A vacuum device could leave carbon deposits at the bottom of the oil pan and potentially contaminate the new oil.
Fuel Requirements:
Use only 91-octane or higher.
Driving Tips:
Do not rev the engine or acceleratew past half throttle immediately after start-up. Oil requires time to heat up for full flow and high RPM driving on a cold engine can damage the turbo.
After highway driving or high-load driving, Subaru recommends allowing the engine to cool by idling for at least 30 seconds before shutting off (which is contrary to what they said before)
Anyone that want a copy, PM me your e-mail. I don't know if I can publish it, but I can send an attachment....
Engine oil and filter:
Proper lubrication of the turbocharger requires high-quality engine oil. Some do not provide enough lubrication. The Subaru Genuine oil filter is the only filter that has tested to meet requirements for filtration and flow. Aftermarket filters may have different filtration performance and relief-valve opening pressure.
Engine Oil and Filter Replacement Interval:
Under normal driving conditions, the recommended oil and filter change interval for turbo engines is every 3750 miles of 4 months. For vehicles driven in conditions beyond normal, such as racing conditions, the oil and filter may require more frequent changing.
Racing Type Driving:
Racing type engins stress doesn't only occur on the track. Racing-type driving occurs when the drivetrain and suspension are used near peak capacity. Any driving where the engine speed is kept high is considered racing-type driving. IMPORTANT: A track day or AUTOCROSS event requires an oil and filter change immediately before and immediately after the event. Make sure to check other fluids as well.
Engine Oil Level:
Check your damn oil stupid! (my words, not theirs, but you get the point)
Oil Changes:
Carbon deposits produced by a turbo engine can accumulate at the bottom of the oil pan. When changing the oil, always drain the oil through the oil pan drain plug.A vacuum device could leave carbon deposits at the bottom of the oil pan and potentially contaminate the new oil.
Fuel Requirements:
Use only 91-octane or higher.
Driving Tips:
Do not rev the engine or acceleratew past half throttle immediately after start-up. Oil requires time to heat up for full flow and high RPM driving on a cold engine can damage the turbo.
After highway driving or high-load driving, Subaru recommends allowing the engine to cool by idling for at least 30 seconds before shutting off (which is contrary to what they said before)
Anyone that want a copy, PM me your e-mail. I don't know if I can publish it, but I can send an attachment....