Editorial Review Supreme formulation, polyglycol based DOT 5.1 brake fluid (non-silicone). DOT 5.1 OK for use in DOT 3/4 systems (DOT-5 fluid is silicone based = do not use). 365F wet boiling point exceeds typical DOT 3/4 (284/311F). Race-life product: 1-2 year replacement intervals. Nitrogen sealed, made in France.