And now for some gasoline facts that some may find hard to believe. Regular gas has a higher energy output compared to premium given the exact same volume of fuel and other conditions being equal. It is more explosive. Why? If you run regular in a higher compression engine then because it explodes more easily then it auto ignites with the piston not quite at top dead center due to the pressure building (it is higher compression than the low performance engine regular was designed for) and the heat in the cylinder. Hence pinging which is trying to force the piston backwards down the bore. To overcome this they add an additive that makes gasoline harder to ignite. The engine manufacturer then raises the compression to increase heat, which the peak occurs later in the stroke, which "controls" the explosion timing better and makes for a bigger ignition when the piston is mechanically in a better location. After all this we see more power from the explosion hence more HP. The reason gas is more volatile in regular is simply because the ignition cycle needs more help to explode in the lower compression engine. So yes, regular is best for the low performance engines and premium is best for what it was intended.
Hope this was explained clearly for everyone
