Coolant is Critical to your Subaru:

New Subaru Long Life Super Coolant

All 2008 Impreza WRX STI vehicles are factory-filled with the new blue-colored Subaru Long Life Super Coolant. The first replacement interval for Subaru Long Life Super Coolant is 11 years/137,500 miles. After that, the replacement interval is 6 years/75,000 miles.

During the 2008 production run, all other Impreza, Forester, Legacy, Outback and Tribeca models will be transitioned from the older green Subaru Long Life Coolant to the new blue Subaru Long Life Super Coolant.

Some of these 2008 models may be filled with the new blue coolant, some may be filled with the older green coolant and some may be filled with a mixture of the two. The regular replacement interval for these 2008 models (except STI) remains at 30 months/30,000 miles.

All 2009 Subaru vehicles will be factory-filled with the blue Subaru Long Life Super Coolant and the longer replacement intervals will apply.

Subaru Long Life Super Coolant may be mixed with the green Subaru Long Life Coolant. However, when mixed, the replacement interval for Subaru Long Life Coolant of 30 months/30,000 miles must then be followed. It comes as a 50/50 pre-diluted mixture and should not be further diluted with water.