Premium brand petrol or supermarket fuel?

[FritzPinguin]

I am using the cheapest stuff I can get around here, which happens to be 95 octane Gasohol, as it is called here. It is essentially gasoline with 5% Ethanol. According to the manual, I might use 91 octane Gasohol or even E20, with 20% Ethanol. Look at the signature for mileage Phuket is quite hilly, and I ride not alone all the time... Normal price for a litre is 37.77 Baht which is well below 1 Euro.

[ericpcx]

I use Morrisons petrol as it is on the way to work and is the cheapest and I get better milage than the equivalent Shell product.So far I haven't had any problems with the "cheaper" petrol