I use the Motul 660 and am very happy with it. Haven't even had to bleed it between DE sessions on hot days and my clutch used to have an intermittent hydraulic problem which is now gone.

You guys should try Performance Friction RH665 brake fluid. Porsche is running it in the 991 Cups. I ran it at Sebring in an SC. No fading issues whatsoever.

Amazon delivered today.