Some European automobile manufacturers request that a phosphate-free
antifreeze be used in their vehicles. This issue is related to the
extremely high mineral content of the water in Europe. If you were
to mix an antifreeze that contained phosphates with the type of water
they have in Europe, it may produce deposits that can settle in the
cooling system and promote corrosion. However, in North America we do
not have this type of water problem. Typical North American coolants
have contained phosphates (which is part of the corrosion inhibitor
package) for many years. Therefore, the question of phosphates is a
non-issue here in North America. Prestone antifreeze/coolant is
completely safe for use in both foreign and domestic vehicles. For
those consumers who would feel more comfortable using a phosphate-free
antifreeze, our Prestone. Extended Life 5/150 is phosphate, silicate,
and borate free. This coolant uses a special chemistry and technology
that extends the life of the corrosion inhibitor package so that it
lasts for five years or 150,000 miles (whichever comes first), and
is safe for all cars and light trucks (old or new).
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