My 2005 Outback developed a leak in the ATF cooling line. I stopped at Advance Auto to buy AT fluid without referencing the manual, but specified the make/model/year. The clerk sold me 3 qts. of Idemitsu Type J, two of which went into the transmission. The third quart went in a few weeks later. I put off getting it repaired and purchased a 4th quart a few weeks later. I have had the line repaired, and added the rest of the type J. When looking up the capacity of the AT I discovered that Subaru specifies Type HP, and learned that the Type J is specifically for Nissan/Infiniti. I am concerned that the Type J might be detrimental to the Subaru transmission. Researching I found that both manufacturers specify JASO 1A, and many general AT fluids are compatible with both, such as Castrol Transmax ATF Import Multi-vehicle Automatic Transmission Fluid. I consulted with a technical advisor at Idemitsu and he said the Type J will damage the Subaru transmission due to how it reacts with the metals. With the leakage I estimate the transmission has about 1/3 type J and 2/3 of the previous Type HP in it. To flush and replace the AT fluid would cost $225 or more. I am shopping for a later model Outback and will be getting rid of the 2005 so don't want to put any money into it, but do not want to damage it. I tried talking to the manager at the Advance Auto store and he said the specs of the two were so close that it wouldn't make any difference and was unwilling to take ant responsibility. Does anyone have any informed insights into my predicament ? Will the partial Type J harm the transmission, particularly if I am only driving short distances ?