For 1990-2009 cars

# RECYCLING OF SATURN EXTENDED LIFE ENGINE COOLANTS

#### SUBJECT: Recycling of Saturn Extended-Life Engine Coolants

#### TO: Saturn Fixed Operations Managers

With the importance of protecting the environment and reducing waste, significant attention is being given to the use of extended-life engine coolants. Saturn vehicles have used specially formulated, extended-life engine coolants since the 1991 model year. Saturn's original "green" engine coolant (P/N 21030365), which is still used for 1991-1995 vehicles and early 1996 vehicles, contains special inhibitors that enables the maintenance period to be 36 months/60 000 km (36,000 miles), versus the 2 year/48 000 km (30,000 miles) period for conventional engine coolant.

Beginning in April, 1996, interim Saturns will be serviced with the next generation of extended-life engine coolant, known as DEX-COOL extended life engine coolant, which has a maintenance period of 60 months/I 60 000 km (I 00,000 miles). DEX-COO, which is "orange" in color, cannot be used in vehicles that were originally built with Saturn's original "green" engine coolant; however, it is the next step in reducing future engine coolant waste.

Recycling engine coolant is another way to reduce waste, and many engine coolant recycling systems are being marketed today. Recycling of Saturn's original "green" engine coolant or DEX-COOL to their original formulation is not feasible at this time; therefore, Saturn Corporation does not endorse the use of any recycled engine coolant in Saturn vehicles. However, Saturn's original "green" engine coolant and DEX-COOL Can be mixed into your "used" conventional engine coolant storage container, and the mixture recycled in the same manner as other engine coolants. This recycled mixture of conventional engine coolants and Saturn engine coolants must then be used as conventional engine coolant and must not be used in Saturn vehicles.

Research will be conducted to evaluate the feasibility of recycling DEX-COOL, to DEX-COOL in the future. As soon as this research is finished and the information is available, a bulletin will be sent to advise you on the possible recycling of DEX-COOL.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.