[DON]

As of 7/2/2024 – Detroit Fluids Specification 93K217 Approved Coolants List:

https://tei-net.com/documents/DFS93K217ApprovedCoolantsList.pdf

[Roscoeapproved]

Don! so is Nitrite good or bad I see same brand coolant one says Nitrite free and the other one says Nitrite added? both say for Detroit approved 93K217?

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Jeff and Lindsay

91 Marathon XL

[Jack]

please read and understand the following Detroit document.

https://dtnacontent-dtna.prd.freightliner.com/content/dam/public/dtna-servicelit/ddc/pdfs/Lube_Oil_Coolant/DDC-SVC-BRO-0002_2020.pdf

On page 3 it states:

For Extended Life Coolants (ELC)

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.

It also states on page 3:

For Standard Life Coolants (SLC)

Standard Life Coolant (SLC) contains inhibitor salts, including nitrites, to prevent liner cavitation.