I have been using the GT LMA too. But when I went to the local car store yesterday, they only had Castrol marked
synthetic brake fluid. So I went to another store and the story was the same. Also, the staff in either store was not able to tell me whether the
synthetic fluid is compatible with the regular Castrol brake fluid, so I contacted Castrol and got this answer:
"Castrol GTLMA now has a higher wet boiling point and the product label has been changed. The product formula has not been changed; Castrol GTLMA has always been a fully
synthetic brake fluid.
The wet boiling point has increased from 311°F to 329°F (155°C to 169°C)
Castrol Consumer Relations"
The conclusion seems to be that it is the same stuff under a new label.
