Originally Posted by Asbo T
Here in Dubai we have Super (98) and Special (95). I've been told by a few people to use Special and then every 5 or so visits to the pumps to use Super as it cleans the system a bit better.
I don't think that it makes it cleaner
as much as makes it run smoother. Here's a quotation from wikipedia:
"Higher octane ratings correlate to higher activation energies: This being the amount of applied energy required to initiate combustion. Since higher octane fuels have higher activation energy requirements, it is less likely that a given compression will cause uncontrolled ignition, otherwise known as autoignition or detonation.
A fuel with a higher octane rating is less prone to auto-ignition and can withstand a greater rise in temperature during the compression stroke of an internal combustion engine without auto-igniting, thus allowing more power to be extracted from the Otto-Cycle."