Shell, V-power, RON-98 & BP, Ultimate ULP, RON-98
And what are cleaning 'adhesives'?I wouldn't let an 'adhesive' anywhere near the combustion chambers.
Its additive, adhesive is a typo.
All the high octane in the world won't prevent your car from knocking if the cam sensor or crank sensor are malfunctioning. If it doesn't knock on regular, just keep using regular. If it does knock, get to the root of the problem and get it fixed.
The sensor issue that you have brought up is just for sake of arguement, in a machine anytime electronics can give in.My arguement would be that the probability of sensor malfunction is as same as any other problem starting Knocking however Knocking can be avoided by using higher RON value fuel.
As for reducing friction between the piston and cylinder wall, thats the job of the engine oil, not the petrol. In fact excess petrol in the combustion chamber actually washes down the cylinder wall, stripping it of lubricant.
SHELL differs with you on this point regarding its V-Power and so would I.
Most of your claims about high octane here are quite outlandish.
I have been quoting, National Roads and Motor Association Senior Policy advisor Jack Haley and his comments about SHELL V-Power 98 RON. I would rather take his words authentic than yours.
The only plausible point is using it for slightly better performance. If your car can advance the ignition timing in response to high octane, go ahead and use it. Keep it mind that the power boost is only marginal, and it is only apparent in the top end of the rev range. You won't even notice the effect driving around normally; anything you feel will mostly be placebo.
There are many experiments done keeping upto 5 cars from different brands and results are seen. The videos are on YouTube. They have taken more factors into account than what we have discussed.