I am curious about using gas in an m117 engine. Almost all gas stations (especially here in california) have ethanol in their gas and I have been told by some friends that this is really bad for the engine and fuel system and should not be used. I am possibly getting an m117 engine car (w108 4.5) but i am 99% sure all stations around me have some ethanol in their gas. Is it really that bad? Is there an additive i can put in to help equalize the affect of ethanol (not sure what it is) on these older engines). What does it do that is so terrible for the engine and is there anything i can do to negate this affect.

Thanks !