If your truck has the extended life anti-freeze your not supposed to use the additive. I think the article I read said trucks before 2002 you need to check. If the anti-freeze is the gold colored do not use the FW-8 or the new FW-16 It does not have to be recharged.
I use fppf polar power in WI we need the anti-gel. It also has inj cleaner,lubericity,and alot of other things.used it for about 10 years have had good luck with it. I have a friend that is a diesel mech. he said not to use the power service has seen alot of bad things with it. Just my .02$
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