Originally Posted by outahere
The last sentence from the May tech tips reads:
"NEW FOR 2008: All turbocharged models are considered to be operated under severe driving conditions and require the oil interval of 3,750 miles or 3.75 months."
The above statement from Subaru is ambiguous. Does it mean that starting in 2008 all MY2005 and later turbos have to adopt the severe service schedule? Or does it mean that the MY2008 turbos have to adopt the severe service schedule?
someone at nasioc sent an email to Subaru to get clarification about this, and this was the reply from subaru:
"Hello Mr. C,
Thank you for your reply. You bring up an excellent question.
Officially, the new maintenance intervals are not retroactive to
previous model years' turbocharged vehicles. We cannot modify what has
already been established in previous model years' Maintenance Schedules,
however, we expect that our dealerships will recommend the severe
schedule to all turbo owners from this point on, as to stay as
consistent as possible.
From a practical standpoint, it will probably be beneficial for ALL
turbocharged vehicle owners to follow the severe driving intervals, as
the previous model years are basically the same in terms of design.
Many turbo AND non-turbo owners are following the 3,750 mile intervals,
based on what our dealers tell us.
Turbocharged vehicle engines are subject to higher combustion, coolant,
oil, and underhood temperatures than non-turbo models. Oil consumption
is also greater for turbo models. As you might expect, they tend to be
driven in a manner more enthusiastic than the average vehicle as to
experience its performance potential.
Please let me know if you have any other questions.
Subaru of America, Inc.
e-Contact Team "