10% ethanol gas?

[Global Warming]

So one of my local stations has started selling 10% ethanol gas (aka gasohol). Its higher octane (89) for the same price as the cheaper gas (87). What are the pros and cons? Obviously you are getting higher octane for less money, it’s also supposed to burn cleaner (which is always true with higher octane). But I also heard that over time it can corrode the fuel system. Is this true? How long and how common are corrosion problems?

Bottom line, should I use it? In my good car and beater? Just in the beater or not at all?

Thanks

[coombsie66]

Dont use it, it will get past your piston rings in blow by, degrade your oil massively more than standard petrol, and i dont know what this octane rating increase from it is all about, because it will decrease the octane (knock sensitivity) of the combustion as alcohols are far more volatile than the hydrocarbon mixes in petrol normally.
If your car is a shitter, and your just running it cheap then it'll work, but i wouldnt put it in my car.

[graywolf624]

Obviously you are getting higher octane for less money, it’s also supposed to burn cleaner (which is always true with higher octane

Pros: cheaper cause the govts promoting it.. better for carbon dioxide
cons: polutes more nitrogen. more likely to contain water which could damage the car. Lower energy per liter (slightly).

[RC45]

^^ and each gallon of grain alcohol requires many pounds of nitrates and other fertilizers be thrown over the growing corn - and so pollute the ground water