Preface

Extended Life Coolants (ELC)

Extended Life Coolant (ELC) contains Organic Acid Technology (OAT) which provides corrosion protection and inhibits liner cavitation. These coolants require less maintenance over the useful life of the engine.

ELC antifreeze coolants are commercially available from Detroit™ (recommended) and other manufacturers as either concentrated or pre-mixed formulations. Concentrated antifreeze coolants should be mixed at 50% (50% antifreeze/50% water). All ELCs used must also meet Detroit 93K217 specification. Detroit™ requires that these types of coolants to be free of nitrite and phosphate. Detroit™ has found that ELCs containing nitrite may lead to a breakdown of the coolant and subsequent damage to the cooling system.

These types of coolants should not be mixed with Standard Life Coolants. If an ELC antifreeze coolant and an SLC antifreeze coolant are mixed, damage may not result, but the long-life advantages of the ELC antifreeze coolant will be lost. In this event, the coolant should be re-inhibited with OAT inhibitors and confirmed by analysis or else it must be maintained as an SLC antifreeze coolant.

Standard Life Coolant (SLC)

Standard Life Coolant (SLC) contains inhibitor salts, including nitrites, to prevent liner cavitation. These coolants require interval testing to maintain inhibitor concentration.

SLC antifreeze coolants are commercially available from Detroit™ (recommended) and other manufacturers as either concentrated or as pre-mixed antifreeze. Concentrated antifreeze coolants should be mixed at 50% (50% antifreeze/50% water). All fully formulated coolants used must also meet Detroit 93K217 specification.

Silicated Organic Acid Technology (Si-OAT)

Silicated Organic Acid technology (Si-OAT) should only be topped off with Silicated Organic Acid technology (Si-OAT) listed on DFS 93K217. Do not mix with other coolants even if they are the same color.

Concentrated antifreeze coolants should be mixed at 50% (50% antifreeze/50% water).