What type of fuel do you guys use? Most Ferrari manuals advise the owners to use 95 Octane, but I think most people still used 91 Octane. Anyone tried 100+ Octane? Should I mix 91 with 100 to make ~50 Octane? I've heard a guy at FBH service saying that 100 Octane can cause the engine to run too rich, and create problems. *** New to the forum. Love this site.