370z requires premium fuel?

frost

I ran across a website that where the topic of discussion was whether cars used for racing should switch. Here is a quote:
"Driving Habits: If you drive your show/race car just once or twice a year you may want to stay with gas because E85 works like a sponge grabbing all the water it can from the air. So driving some on a weekly basis would be good. If you use E85 keep it moving don't store it! If you need to park your car for long terms you should fill your tank with gas and stabill. This will provide you with some protection from rust and fuel system problems."

Not sure why grabbing all the water from the air would be a bad thing though. Maybe cause of dilution to the oil?

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370z OG