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Subaru Super Coolant #5116524
05/26/19 05:10 PM
05/26/19 05:10 PM
Joined: Jan 2019
Posts: 111
Pennsylvania
FA_WRX Offline OP
FA_WRX  Offline OP

Joined: Jan 2019
Posts: 111
Pennsylvania
Does Subaru suggest using their coolant conditioner when changing coolant in later model cars? I've read that might have been only for mid 2000 model years.

Last edited by FA_WRX; 05/26/19 05:11 PM.

2015 WRX FA20F
QSUD 5W-30
Tokyo Roki 15208AA170 filter

Re: Subaru Super Coolant [Re: FA_WRX] #5116607
05/26/19 06:42 PM
05/26/19 06:42 PM
Joined: Aug 2008
Posts: 348
NJ
Padawan Offline
Padawan  Offline

Joined: Aug 2008
Posts: 348
NJ
Yes, the 2015 WRX service manual states:

2. FILLING OF ENGINE COOLANT

1) Pour cooling system conditioner through the filler neck of coolant filler tank.
Cooling system protective agent:
Refer to “SPECIFICATION” for cooling system protective agent. <Ref. to CO(STI)-2, SPECIFICATION, General Description.>

2) Fill the engine coolant into coolant filler tank up to the filler neck position.

The "cooling system protective agent" is listed as P/N SOA345001 in the manual.

Re: Subaru Super Coolant [Re: Padawan] #5116788
05/26/19 09:25 PM
05/26/19 09:25 PM
Joined: Jan 2009
Posts: 7,184
New England
gathermewool Offline
gathermewool  Offline

Joined: Jan 2009
Posts: 7,184
New England
Originally Posted by Padawan
Yes, the 2015 WRX service manual states:

2. FILLING OF ENGINE COOLANT

1) Pour cooling system conditioner through the filler neck of coolant filler tank.
Cooling system protective agent:
Refer to “SPECIFICATION” for cooling system protective agent. <Ref. to CO(STI)-2, SPECIFICATION, General Description.>

2) Fill the engine coolant into coolant filler tank up to the filler neck position.

The "cooling system protective agent" is listed as P/N SOA345001 in the manual.


I wonder why its not listed in the owner's manual. Changing the coolant must be beyond what they figure the average owner is capable of...


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Magnatec 5W-20 + FU filter (47,300 miles)
Re: Subaru Super Coolant [Re: FA_WRX] #5116889
05/27/19 12:11 AM
05/27/19 12:11 AM
Joined: Aug 2008
Posts: 348
NJ
Padawan Offline
Padawan  Offline

Joined: Aug 2008
Posts: 348
NJ
It used to be stated on earlier models, but for some reason they changed the manual to imply that it's not owner servicable.

Re: Subaru Super Coolant [Re: FA_WRX] #5116918
05/27/19 02:15 AM
05/27/19 02:15 AM
Joined: Jan 2019
Posts: 111
Pennsylvania
FA_WRX Offline OP
FA_WRX  Offline OP

Joined: Jan 2019
Posts: 111
Pennsylvania
Yes. You would think they could list it in the fluids/capacity section. Or maybe the thinking is with a suggested 137k service interval its not a service done a lot.


2015 WRX FA20F
QSUD 5W-30
Tokyo Roki 15208AA170 filter

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