Thats pure class (That link) Least after he drained it he could have a drink for the success of it haha typical yank me thinks 
I'm keen on using this to correct some knock, has anyone actually done some logging to prove a beneficial effect?
Also which ones best to use?
Yes I've logged to check beneficial effect time after time.
Race fuel is fair enough but how safe is this on my 104,000 mile engine.
WMi is a cooler and octant contributor as a consideration
Miller CVL turbo I have used previously, works well..
Used this too previously.. also works
http://www.merlinmotorsport.co.uk/p5895/SILKOLENE-PRO-BOOST-OCTANE-IMPROVER/product_info.html