Hi all,

I am working in Iowa for a while and the state supports its corn producers by reducing taxes on fuel with a high ethanol content.How high I'm not sure ,but more than 10%.Gas stations label this stuff premium unleaded.I have not fueled up yet in Iowa and I thought I would seek a little feedback on possible problems related to higher ethanol %.One that comes to my mind is o2 sensor fault codes.
What do ya think?


thanks for any info, x5zeb
P.S.I am driving a 2003 x5 3.o sport/premium titanium silver