mfzx6r wrote:Dan
I have put ULP in mine when they had no Prem ULP so mixed it with what was in the tank.
ok... will shed some light on this subject for those interested. As you might be aware, Motorcycles run very high compression ratio. The normal cycle of the engine is the fuel/air mix be ignited at the ignition stroke. What happens when you run a lower octane level fuel, is it has a lower temperature and compression tolorance and causes the fuel to self ignite (commonly known as pinging) and can destroy engines, esp pistions. By running the higher octane as recommended, this problem is avoided. Its not so much for extra performance than it is to keep the engine from self destructing.
As for Vortex 98, there are no cleaning agents like in optimax that cause the issues with motorcycle engines. It isnt the fuel as such, i believe its the cleaning agent in optimax that causes trouble.
Kieran (10R)
Quiet they're sleeping.
2007 YZF-1000 R1
2003 BA XR8
2004 ZX 10R is Gone
2002 ZX 6R 636 (is Gone)