Is it necessary to use Castrol brand brake fluid on my 2001 XK8? I've been replacing brake lines and have used up my supply of recently purchased Castrol DOT4 brake fluid. Now I find it is no longer available locally and my online source doesn't have it any more. If I can use another brand can I top off with it or do I need the same brand throughout the system?

 

Yes, you can switch brands of DOT 4 without any issues. Over the decades I have used Prestone, NAPA, and probably several other brands with no problem. Topping up one brand with another brand is fine as well....

 

ANY Super DOT 4 will work.
Jaguar changed from a green square tin to plastic 500ml bottles (orange or grey) when I worked at the dealer more than a dozen years ago.

The containers simply said 'Made in the EU for Jaguar'.

No indication that Castrol was the manufacturer.

 

Thank you very much for your quick responses. Now I can continue my project.