I just read the following in the Herald Sun news paper
"If you have purchased a product labelled Carstrol Response Dot 4 (brake fuild) in a four litre DARK GREY bottle, it has been incorrectly labelled and contains another form of lubricant.
The correctly labelled product for Castrol Response Dot 4 (four litre) is a RED bottle.
Using the incorrect product will result in detrimental performance of the vehicle's/motorcycle's braking system.
Castrol is currently investigating the extent to which this product has been incorrectly labelled.
If you have purchased or already used the incorrectly labelled product, please stop using it immediately and contact Catrol on 1800 681 099"