I did buy some Fuchs TITAN SINTOFLUID SAE 75W-80 but I have been doing lots of reading and I mean lots, some say not to use GL-5 and others say its fine but from reading what others have said changing to Fuchs has made no difference.
Then started to look at Redline and lots of people swear by it and say its made a big improvement, so I think I am going to upgrade/side step to Redline MT-90 or High Performance.
Will do a write up on my findings once I have used the car for a few days.