the main problem you'll find with skyline drivers, is the need versus the convenience.
Theres nowhere near enough e85 stations to make daily and long distance drives practical, the distance between stations is often not feasible for those who drive around the state a lot... at least with 98 you can find it in most stations...and then there is the reduction in efficiency, which means those on e85 have to fill up 20% more often than those with a tank of petrol (ala lpg, a low density gas)...I'm all for alternative fuels, esp if theyre environmentally friendly (which e85 is) and cheap per vol (whcih e85 is) but we cant really tune our dailies for it until stations start offering it. Even with nisstune, it'd take a laptop to program an alternate fuel map - who wants to do that? Its just not practical.
I can say confidently, that when our oil reserves run out and we get forced to use e85, there wont be a proble, but till then, keep tuning for 98 ron- unless you're a trackhound and can get tankers delivering the good stuff....
-D