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Can I use extenders in place of SCAs and vice versa with Prestone® Heavy Duty Extended Life Antifreeze/Coolant?

April 26, 2017antifreeze coolant duty extended extenders heavy life prestone® SCA versa

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Can I use extenders in place of SCAs and vice versa with Prestone® Heavy Duty Extended Life Antifreeze/Coolant?

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A. Both SCA and Extender are used to supplement engine coolants to provide a fully formulated heavy duty (HD) coolant. However, SCA’s and Extenders are as different as conventional silicated HD coolant is to Extended Life HD coolants. SCA chemistry is typically based on a combination of nitrite and inorganic corrosion inhibitors, while Extenders are typically based on nitrite and organic corrosion inhibitors. The use of SCA’s in Extended Life coolants or Extenders in silicated formulations will negate the benefits of the additive and could jeopardize the cooling systems life.