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Old 05-19-2017, 08:25 PM   #16
sly
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Quote:
Originally Posted by mav1178 View Post
The factory service manual says nothing about using the conditioner to prevent head gasket leaks.

If this was a known issue they would list it as "required materials" instead of "recommended materials" in the Service Manual.

You're right. It's not required but recommended. The service manual gives the part number for the coolant and the cooling system conditioner so obviously it can be used in a BRZ.


I guess if you want to leave it out, that's your choice. But it's only $6 or so, so why leave it out and take that chance?
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