Tom as far as I can tell your spark plugs should be fine. I also run a UR-5. I live in Central Texas so hard starting this time of year is not a problem. BTW: Define hard starting. My White-T( E-85 car ) has never started as quickly as using E-85 or 93 compared to my GN which is a race gas or pump gas car??
aminga - you bring up some good questions about E-85 but remember that Ethanol is Methanol's distant cousin and much of the problems associated with Methanol are just not a factor with E-85 being that its a diluted version Ethanol. Do some investigating to seperate myth from the facts understand the differences. E-85 is alot easier to use than most think, get the fueling right and your not going to go back to crap gas or race gas for that matter.
I have seen no imperical eveidence that E-85 has destroyed anyone's car that has run it for an extended period of time that would include WRX's, Evos, Turbo volvos, TurboBuicks , etc, etc I have been in contact with WALBRO's testing lab and again all data is non-conclusive to date about fuel pump problems, though we all should understand that the copper windings in these standard pumps are a weak spot.
Furthemore questions about the E-85 vs E-75 are moot for the simple fact that ethanol fuel at those mixtures are light years ahead of any 93 you'll ever get or 100 LL for that matter. E-85 used in the summer and E-75 ( to ease hard starting )the winter months respectively... like 93 is just a rock solid mixture itself from season to season
Razor - quit screwing around and get on the wagon