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For those of you who are concerned about using a phosphate-free
antifreeze to avoid damage to the aluminum components of your
I went on an expedition yesterday to various parts stores to check
out what's there. I found that sometime in the last year or so, the
manufacturers have started listing the components of the antifreeze
on the labels! This was NOT the case on the two-year-old Zerex
bottle I had at home.
In most cases, a component containing phosphate was listed - EVEN if
the label said "Protects all engines - even those with aluminum".
But by checking the labels, I was able to find antifreezes without
any phosphate component listed. Usually these were about $1 more per
gallon, but big hairy deal...who cares.
I personally selected the Prestone 4/60 extended use antifreeze which
was clearly labeled "Phosphate Free". It's supposed to be good for
four years or 60K miles. I don't run that much milege even in six
years, but I decided the extended use rating wouldn't hurt. The
stuff ran about $7.50 per gallon.
As always, YMMV.