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2006 V50 T5 6spd Manual
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2,510 Posts
Discussion Starter #1
I'll be dropping a new engine in the BattleWagon within the next week, and am wondering, should I add the conditioner to a brand new (remfg) engine? Or should I wait a while?
 

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2005 Forester XT 4eat
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4,583 Posts
I think it depends on 2 things:

1) Did you use it the last time you changed your coolant?

2) How long has it been since said coolant change?

If you used it recently, I would definitely not use it again just yet. The stuff turns into a tar like goo that sticks to everything. I used it every time I changed my coolant, which I changed about once a year. I know this is more than the manual specifies, which is what I believe led to my first radiator popping at around 70,000 miles.
 

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2019 Crosstrek 2018 XT
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14,487 Posts
I would use it. I have used it in multiple cars and personally have not seen any goo. But that's just me.
 

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2007 Forester Sports XT 4EAT
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1998 Cayenne GTS 6speed
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1,751 Posts
Yes, do add coolant conditioner. At the very least, it will not hurt, if used in moderation.

P.S. You (i.e., everyone with 99-03 SHOC engine) should to add that stuff every time you change/flush coolant.
 

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Ah crap.. I'm back with my 05 XS
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8,294 Posts
Shake it up well so you break up the clumps and pour it in slowly while the coolant is cycling.
 

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2006 V50 T5 6spd Manual
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2,510 Posts
Discussion Starter #7
Mmkay. I bought it when I bought the coolant earlier today (the real Subaru green stuff... no expenses spared in this operation... lol) just in case.
 

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2009 Forester XT 4EAT
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2,265 Posts
Hey bud, I'd flush out the radiator and heater real well and use it.
-Tom
 

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Ah crap.. I'm back with my 05 XS
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^Yeah might be a good idea since the Subie dealer techs tell me the conditioner can block coolant passages sometimes. They also class it with snake oil :lol: But it's ultimately up to you.
 

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116 Posts
YES! Use it.....

It may just save your donkey....:icon_biggrin:

I do flush and fills every 2 years and use it. All stories about clogging arteries aside :icon_wink:, why wouldn't you if the factory does?
 

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2006 V50 T5 6spd Manual
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2,510 Posts
Discussion Starter #11
Yeah, I'm thinking... flush the radiator and heater cores, and use it. I change the coolant every 30k miles (every year for me) which involves a passive flush (just a fresh water fill and drive for 15 miles) and then refilling with distilled, Subbie green coolant, and conditioner. Just didn't know the protocol for a new engine. :smile:
 
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