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New Specifications
for Recycled Engine Coolants

The first industry-wide consensus specifications for recycled engine coolants will be available May 1 from ASTM, to benefit automotive and light-duty vehicle OEMs, service facilities, engine coolant recyclers, and government regulators. They are:

- D 6471, Specification for Recycled Prediluted Aqueous Glycol Base Engine Coolant (50 Volume Percent Minimum) for Automobile and Light-Duty Service; and
- D 6472, Specification for Recycled Glycol Base Engine Coolant Concentrate for Automobiles and Light-Duty Service.

“Prior to the implementation of these new specifications, there were not industry consensus standards that anyone could use to evaluate automotive recycled coolants and processes,” notes René Wiebe, laboratory manager, Wynn Oil Company, Calif., and chairman of the Recycled Engine Coolant Subcommittee D15.15 that developed the standards. “This opened up the market to processors that produced poor-quality recycled engine coolants and caused several users to generate their own specifications to protect themselves. Use of recycled engine coolants meeting these new industry standards will conserve natural resources, and provide the user with a means to evaluate recycled engine coolants and processes to assure them that they are using good quality recycled engine coolants.

“The specifications are designed to test and evaluate a coolant recycling process and the resulting recycled engine coolant,” he continues. “A company wishing to evaluate their engine coolant recycling process and recycled engine coolant starts out with a reference synthetic used engine coolant that was developed and is specified in one of the annexes, and then runs it through their recycling process. The resulting engine coolant is then tested in accordance with the physical, chemical, and performance test requirements spelled out in the standards.” Participating in the development of D 6471 and D 6472 were major chemical and automobile manufacturers with multi-national representation, engine coolant producers, and state regulators.

“The standards were developed to evaluate many different types of engine coolant recycling processes and resulting recycled engine coolants,” concludes Wiebe. “This was done by developing physical, chemical, and performance specifications that would apply to engine coolant recycling technologies in one of two ways. For engine coolant recycling technologies that can meet all the primary requirements and the chemical ‘hinge’ limits, fleet testing is not required. If the chemical ‘hinge’ limits cannot be met, fleet testing is necessary to validate the performance of the recycling process and recycled engine coolant.”

ASTM standards are available by calling Customer Service (610/832-9585) or through the Web site.

For further technical information, contact René Wiebe, Wynn Oil Company, 1050 W. Fifth St., Azusa, CA 91702 (626/334-0231, x. 350). Committee D15 meets May 23 in Toronto, Ontario, Canada. For meeting or membership details, contact manager Gloria Collins, ASTM (610/832-9715). //

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