Hi

I am looking for a better brake fluid for Tasmanian country driving use and occasional track use.  On the web site (https://www.penriteoil.com.au/products/racing-brake-fluid) under the Product Description tab, it mentions "Do not use in brake cylinders & reservoirs with a high percentage content of Magnesium".  Can you tell me how to determine whether this would be an issue for my car (1988 AE82 Toyota Corolla Twin Cam 16 4Age)?

Thanks for all the help I can get.

Rob