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garcmol · 08-17-2012, 09:59 AM

hygroscopic brake fluid is made to absord moisture. That's how the "wet" boiling point is determined, which is much lower than the dry. 3, 4, 5.1

If you put hypophobic brake fluid (DOT 5 does not absorb moisture) it will keep a higher boiling point over it's life, but moisture and the fluid will be separate. Not good.

Moisture is going to happen just with hot engines and cool outside temps. Condensation you can't beat. What happened to Doug is he met and surpassed that wet boiling temp and the fluid was literally vaporized. That vapor is compressed which won't allow the flow of hydraulic fluids.

Charts usually show a 3.7% value of moisture to achieve a "wet" boiling temp. The more we drive with the same fluid in there, the more moisture it's going to absorb and that value will get larger while your boiling point keeps decreasing.

So, moisture is going to happen period. You want it to be absorbed in the fluid, you just want to change it more often if you track your car.

08-17-2012, 09:59 AM	#4957
garcmol Drives: 10 1LT SIM; 91 B4C sleeper Z Join Date: Aug 2009 Location: Ft. Mitchell, Alabama Posts: 7,199	hygroscopic brake fluid is made to absord moisture. That's how the "wet" boiling point is determined, which is much lower than the dry. 3, 4, 5.1 If you put hypophobic brake fluid (DOT 5 does not absorb moisture) it will keep a higher boiling point over it's life, but moisture and the fluid will be separate. Not good. Moisture is going to happen just with hot engines and cool outside temps. Condensation you can't beat. What happened to Doug is he met and surpassed that wet boiling temp and the fluid was literally vaporized. That vapor is compressed which won't allow the flow of hydraulic fluids. Charts usually show a 3.7% value of moisture to achieve a "wet" boiling temp. The more we drive with the same fluid in there, the more moisture it's going to absorb and that value will get larger while your boiling point keeps decreasing. So, moisture is going to happen period. You want it to be absorbed in the fluid, you just want to change it more often if you track your car. __________________ Pedders Pace Car Package, Injen CAI, Flowmaster AT, AAC Lighting, ZL1 fascia/skirts, RKSport Ram Air hood, vented fenders, painted stripes (Gary's Customz), Honor and Valor badged (Thank you, John)