Join Date: Jun 2009
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Re: what octane rating do you put in your cube?
You can actually get worse milage if you use a higher grade fuel than recommended. I actually study Chemical Engineering and this is a topic that we have discussed before. Engines are tuned to operated with a certain octane rating. This octane rating (in the most basic sense) gives an idea of the compression required by the piston before the fuel ignites. Higher grades of fuel typically require higher compression before they ignite, hence why the regular fuel is bad for high performance engines: regular fuel combusts before the piston has fully compressed. The opposite is also true: if you have a lower performance engine, higher grade fuel will not always combust at the proper time in.
The short story: THERE IS NO REASON TO PUT HIGHER GRADE FUEL IN YOUR CUBE
09 Super Black 1.8SL - Preferred Package, Interior Designer Package, Interior Illumination Package, Aero Kit