Originally Posted by
Mr_will
i work for mobil. its 2.5cents cheaper than regular unleaded petrol at mobil, that is a fact.
youre right - the euro does use premium unleaded. so E10 is too low an octane rating (93, when the euro needs 95 or above) - you shouldnt be using it in the first place.
using a petrol with a lower octane rating can actually give you less power. higher octane fuels burn more slowly and are thus ignited earlier in the combustion process. by using a lower octane fuel that burns more quickly, you risk reaching peak cylinder pressure before the piston is at top dead centre.
this is not good for your engine.
oh wow. 10cents a litre. on a 50litre tank thats $5. if you fill up once a week thats $250 a year. if you can afford a euro you can afford $250 a year.