I am going to change mine soon. I've looked into alot of ones such as fuchs, millers and Red Line. I had only heard of fuchs, castrol and millers oil before but Red Line looks like it ticks all my requirements such as works from word go in cold weathers and protect sychromesh's, for the my clio 197 it would be 3rd sychro. I want it to make gear changes smoother for when I give the car a blast as at present the gear changes aren't smooth, going from 3rd-4th is a bit stiff. Hopefully Red Line oil can rectify that.