I have personally used E85 fuel in my 1997 Dodge Grand Caravan and have found it to run much better then with regular fuels. I would have to say yes in moderation. Look for a sticker inside the gas door, or call your local dealer with the vin number to have them check.
i think its in the back around the gas tank. it should be attached to the vapor cannister On my 1997 Grand Caravan 3.0L, its located underneath the steering gear just a little ahead of where the driver sits. Its above a panel and held in by four bolts.