Used to run Redline MTL 75W-80
But have recently moved to MT-90. Mainly due to the slightly higher viscosity and the GL4 - Purposely designed for the brass sycnros. However I can't cast my vote as it's not any option
I started running this earlier in the year and I know quite a few people have moved to it now and Northloopcup who rebuilds Clio boxes has started to recommend it to people who's box's he's built.