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The compatibility of selected metals representative of those commonly used in dispensing
systems was evaluated in an aggressive E20 formulation (CE20a) and in synthetic gasoline
(Reference Fuel C) in identical testing to facilitate comparison of results. The testing was
performed at modestly elevated temperature (nominally 60°C) and with constant fluid flow in an
effort to accelerate potential interactions in the screening test.
Based on weight change, the general corrosion of all individual coupons exposed in the vapor

Ethanol is a very attractive fuel from an end-use perspective because it has a high chemical octane number and a high
latent heat of vaporization. When an engine is optimized to take advantage of these fuel properties, both efficiency and
power can be increased through higher compression ratio, direct fuel injection, higher levels of boost, and a reduced need
for enrichment to mitigate knock or protect the engine and aftertreatment system from overheating.