Fuel types (non ethanol)

[BimmerRob08]

So for the last 15 years that I’ve been State Side since I bought my M3 in Europe (military program), I’ve used premium 91 and it’s always been 10% ethanol. In Europe at the time I used Super and didn’t have an “increased emissions” check light with HFC, until using US grade fuel on base and State side until I had DINAN stage II software installed. Funny how European fuel didn’t light it off but crap US fuel quality did. Anyhow, my M3 isn’t driven as much as I used to due to traveling work schedule and I’m considering running non-ethanol grade 91, few gas stations near me have it. Also about to do some preventative maintenance and replace all the injecters, sensors and breather valves, etc. Will switching to non-ethanol 91 run well, better, reduce possible ethanol gumming up? I’ve researched this but not completely sold it is safe to do so.

[RocketyMan]

Non-ethanol clear gasoline is completely safe. It has more BTUs per gallon than e10 fuel per gallon. It also stores better because it doesn't have the ethanol in it. Therefore, it doesn't attract water like ethanol blended fuels do.

Downsides is that it costs more and availability can be hard to find.