They are all pretty compatible as long as they are the same type that's currently being used. OAT is basically extended life with no additives. SCA requires corrosion resistant additives and cannot be mixed with OAT. I flushed and went with OAT to make sure I knew what I had in there. Be sure and change the filter if you flush the system.
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2004 Beaver Monterey Laguna IV
Cummins ISC 350HP Allison 3000 6 speed
2020 Chevy Equinox Premier 2.0t 9 speed AWD
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