In case someone did not see the factory manuals for Megane III, which might be also applicable to Megane II...
They recommend DOT4 ISO 4925 Class 6 for ESP systems, DOT4 ISO 4925 Class 4 for ABS and emergency brake assistance systems and DOT4 non-classed for the systems which we don't have in the UK. Widely available DOT5.1 is approximately equivalent to ISO 4925 Class 6.
As a guideline, DOT4 ISO 4925 Class 6 and DOT5.1 are about half as thick as DOT4 ISO 4925 Class 4 at low temperatures. A basic non-classed DOT4 can be tree times thicker than the good stuff. Wet and dry boiling points of DOT4 Class 6 and DOT5.1 are typically significantly higher than of DOT4 Class 4 or non-classed (apart from the racing fluids like Motul RBF600 or RBF660).
Any of these fluids need to be changed every second year.
Conclusion: buy DOT4 Class 6 or DOT5.1 for your car.
Just DOT4 brake fluid is not good enough!
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Just DOT4 brake fluid is not good enough!
AlexB
(no, a different AlexB)
(no, a different AlexB)
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