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To: elmatador who wrote (151560)	5/21/2011 12:14:57 PM
From: Bearcatbob	Respond to of 206085

elamat - oxygenation is an additive - it does not have to be a fuel. Bob

To: elmatador who wrote (151560)	5/21/2011 1:26:34 PM
From: Dennis Roth	4 Recommendations Read Replies (2) \| Respond to of 206085

Modern computer controlled direct fuel injected engines don't need oxygenates to meet emissions standards. They were only useful on old carburetted engines. I haven't tuned a car with a carburetor, points, and condenser in decades. Air pollution benefits from oxygenated fuels have thus far been difficult to quantify and to attribute to oxygenated fuel, but undoubtedly small. The promotion of, Federal subsidy for, and high import tariffs protecting domestic production of ethanol motor fuel and the Federal mandate for oxygenated gasoline are essentially political phenomena. The EPA's authority to mandate that minimum proportions of oxygenates be added to automotive gasoline on regional and seasonal basis to reduce air pollution expired in 2006. MTBE and ethanol were originally mandated in an attempt to reduce air pollution. Today's ethanol mandate uses stopping global warming and energy independence as the rational. Tetraethyl lead was an anti-knock additive. en.wikipedia.org