Outback F4-2.5L SOHC (2005)
Assume that the coolant concentration must be increased from 25% to 40%. Find point A, where the 25% line of coolant concentration intersects with
the 40% curve of the necessary coolant concentration, and read the scale on the vertical axis of the graph at height A. The quantity of coolant to be
drained is 2.1 L (2.2 US qt. 1.8 Imp. qt.). Drain 2.1 L (2.2 US qt., 1.8 Imp. qt.) of coolant from the cooling system and add 2.1 L (2.2 US qt., 1.8
Imp. qt.) of the undiluted solution of SUBARU coolant.
If a coolant concentration of 50% is needed, drain all the coolant and refill with the undiluted solution only.