Will ethanol not be good for my 1996 ford explorer engine?

Will ethanol not be good for my 1996 ford explorer engine?

Ethanol can 'eat' some gaskets & 'rubber' O-rings in the fuel system & the engine, & current cars have been designed to use it with no problems. But, no idea about your '96. Best call a Ford garage & find out…

It can't tolerate anything more than 10%, which is the way most gasoline comes.

Yours is designed for using 10% ethanol as are virtually all engines built in the last 20/25 years.