Mtb154 Posted January 16, 2014 Share Posted January 16, 2014 Hi guys, Noticed today my brake fluid needs topped up, is it ok to mix brands as long as its all Dot 3 ?? I ask this as I dont know what kind is already in it. Quote Link to comment Share on other sites More sharing options...
Jay762 Posted January 16, 2014 Share Posted January 16, 2014 yes that is fine - but as you have low fluid check your pad wear (I assume no leaks) also if it hasnt been changed in a couple of years I would recommend a refresh with new fluid (I myself would go with Dot 5.1 as it has higher temp tolerance than 3) Quote Link to comment Share on other sites More sharing options...
Mtb154 Posted January 16, 2014 Author Share Posted January 16, 2014 Good point about the pads, I will check them first, is it ok to change to dot 5.1 with regards to the internals of the system?? Quote Link to comment Share on other sites More sharing options...
Gambit Posted January 17, 2014 Share Posted January 17, 2014 Should be fine I have 5.1 in mine and never had a problem. Quote Link to comment Share on other sites More sharing options...
stants Posted January 17, 2014 Share Posted January 17, 2014 Don't even think you can get dot 3 anymore. 4 is a direct replacement, check with subaru if your unsure i think that 5 has a different chemical compsoition and could rot the lines and seals if not compatable. Quote Link to comment Share on other sites More sharing options...
Jay762 Posted January 17, 2014 Share Posted January 17, 2014 5 is different that is silicone based which can affect the seals - 5.1 is different again but similar to 3 and 4 (just with higher temp tolerances) so shouldnt cause any damage to the rubber 1 Quote Link to comment Share on other sites More sharing options...
stants Posted January 17, 2014 Share Posted January 17, 2014 Jay, thanks for that i assumed the two were the same as the mazda wouldn't accept either. I know what i'll be putting in mine at next change now :-) Quote Link to comment Share on other sites More sharing options...
Jay762 Posted January 17, 2014 Share Posted January 17, 2014 This is the Shel stuff I use at the moment but Opie have a wider choice of brands - which includes DOT 3 if needed http://www.smithandallan.com/prodpage.aspx?id=3727 http://www.opieoils.co.uk/c-450-brake-fluid-clutch-fluid.aspx Quote Link to comment Share on other sites More sharing options...
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