I have to say that I would be much impressed by a 240Z revving up to 9500. That makes an interesting competitor at the traffic light
I speak from experience that shifting late cos of high revs is an advantage.
And about the bio stuff. Most modern diesels (Volkswagen TDI) have sealings and hoses that are vegitable oil resistant. But the older engines won't. And the damage can be serious.
You can also try to run your car on LPG or even better CNG. CNG has a octane number of 114. And if you have a good ECU setup it can detect the octane your running on.
Fast diesels are out. Sportscars on CNG are in
Derby