I'm a general opposer of E10, I'll try not to rant here, but between the process of farming and distilling it, the extra transport and mixing, and the increased burn rate, it does nothing for the environment.
It also gets used faster, NRMA drove 2 identical cars from Melbourne to Brisbane one on Unleaded, and one on E10, and the Unleaded one ended up costing less to run (and that was back when E10 was 10c cheaper) as the E10 needed more stops.
Removing regular just allows the fuel companies to up the price of E10 and not have to compare it to anything, which means they pay less for it, but we don't.
As for cars, mowers, or anything else petrol powered, those rated to use it still wear out faster from it, they are just made to hold out against it long enough that it does not look bad for the manufacturer, don't forget, they benefit from more seals, lines, tanks and gaskets being bought by the consumer.
Anyway, here endeth the LessonRant
