Seal Compatibility
Mobil 1 ATF says it is compatible with mineral ATF fluids and all common seal materials. It also says it is of the same "quality level" as GM Dexron (although it doesn't say it is approved by GM).
Parker's O-ring handbook 5700 says Dexron is compatible with both Nitrile (probably the most common o-ring material if the material is not otherwise specified) and Fluorocarbon (Viton).
Although Mobil 1 ATF is not specifically listed in handbook 5700, it seems like it should be compatible with Nitrile and Fluorocarbon.
And by the way, there is no such thing as "fire proof brake fluid". Most petroleum and synthetic fluids will burn if you get them hot enough.
The flash point of Mobil 1 ATF is listed as 220 deg C.
The flash point of MIL-PRF-83282 (Royco 782 earlier in this thread) is 345 deg C. This is specifically made as a hydraulic (brake) fluid and is compatible with MIL-H-5606 and older spec.
Mobil 1 ATF says it is compatible with mineral ATF fluids and all common seal materials. It also says it is of the same "quality level" as GM Dexron (although it doesn't say it is approved by GM).
Parker's O-ring handbook 5700 says Dexron is compatible with both Nitrile (probably the most common o-ring material if the material is not otherwise specified) and Fluorocarbon (Viton).
Although Mobil 1 ATF is not specifically listed in handbook 5700, it seems like it should be compatible with Nitrile and Fluorocarbon.
And by the way, there is no such thing as "fire proof brake fluid". Most petroleum and synthetic fluids will burn if you get them hot enough.
The flash point of Mobil 1 ATF is listed as 220 deg C.
The flash point of MIL-PRF-83282 (Royco 782 earlier in this thread) is 345 deg C. This is specifically made as a hydraulic (brake) fluid and is compatible with MIL-H-5606 and older spec.
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