Quote:
Originally Posted by semcoinc
K, I stand corrected, however, do you find DOT 5.1 to be higher than DOT 3?
Mike
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Wasn't out to correct anyone - I would have sided with your original statement too.
Just thought it was weird that the "higher" spec fluid was rated lower. Devil is in the detail though, as they don't state the "wet" boiling point. It seem the DOT 5.1. remains consistent at 272C while the DOT 4 performance drops off as it absorbs water - they state the wet boiling point as only 204C, so it's clear that the DOT 5.1 holds up better as it ages.
So you are correct - out of the bottle the DOT 4 is better but as soon as it's in service and starts absorbing water, it's boiling point drops.
The DOT 5.1 is as you said...