"doesn't alcohol hurt fuel systems in the long term?"
Depends on the engine. Some fuel systems have gaskets that slowly melt when exposed to alcohol. Most newer once do not.
Thanks.
Actually, it's not "slowly" at all, in some cases. And if you try to feed a 2003 Mustang 4.6L E85, you discover that *real* fast.
Most modern fuel systems are more tolerant of alcohol, but they're not alcohol proof.
Any contaminants in your current fuel system (gas tank/lines) will be disolved and flow through the system...be prepared to change out multiple fuel filters in a short period of time .
Some electric fuel pumps do not get along with alcohol and burn up.
You will need to set your vehicle up for alcohol use.