Forester F4-2.5L Turbo (2009)
Engine Oil: Technical Service Bulletins
Engine - Engine Oil System Flushing
NUMBER: 02-110-10
DATE: 01/05/11
APPLICABILITY: All Turbo Models
SUBJECT: Subaru Genuine Engine Oil System Flush
INTRODUCTION
The purpose of this bulletin is to announce a new product that is now available through the Subaru Genuine Chemical Program, "Subaru Engine Oil
System Flush"
The main cause of turbocharger failure is lack of lubrication due to insufficient maintenance Currently, 2010MY and prior turbocharged engines require
that the oil and filter be changed every 3,750 miles (6,000km) or 3-3/4 months All 2011MY turbocharged engines require that the oil and filter be
changed every 7,500 miles (12,000 km) or 7.5 months
Proper oil change maintenance is critical to the lubrication of engine components, especially in turbocharged engines When engine oil maintenance is not
performed at required intervals, oil gelling (sludge) and deposits caused by deterioration of the oil will clog oil passages, causing excessive wear from
lack of lubrication If the mesh filter screen located inside the banjo bolt that secures the turbocharger oil supply pipe to the back of the right cylinder
head becomes clogged, the turbocharger will fail. In addition, this will also cause damage to the Active Valve Control System (AVCS) As a reference,
refer to Service Bulletin 02-106-08R, Turbocharger Mesh Filter Screen
Synthetic Oil
Subaru of America Inc recommends using synthetic motor oil in all turbo charged engines. When using synthetic oil, you must use oil of the same
classification, viscosity and grade shown in this Owner's Manual, and must follow the oil and filter changing intervals shown in the maintenance
schedule.
PART INFORMATION
