Can I use the gasoline remaining after removal of the phase separated water and alcohol?
No. The remaining gasoline, without ethanol, will have an octane level below the original E10 fuel’s octane level, approximately 2 ~ 3 points lower. This octane level may be below the requirements of the engine. Q. What issues are caused by ethanol’s strong cleaning (solvent) properties? It is normal for gasoline to leave varnish deposits and for surface corrosion to occur inside the tanks and pipes used for fuel transportation and storage: rust on steel and oxides on aluminum. Ethanol will clean any varnish as well as rust and oxides from any surface it contacts. Gasoline without ethanol does not clean the varnish, rust or oxides. Since ethanol is added at the distributor facilities, it will clean any storage pipes and tanks, truck tanks, gas station storage tanks and your engine fuel systems. The amount of material cleaned from all of these systems can quickly exceed the filtration capacity of filters located in fuel systems resulting in restricted fuel flow. If these clogged filters
