joeblow wrote:Sounds like we may be neighbors. I am at 7000ft in Kamas, Utah. Are you in Park City? My wife works at St. Regis and after working a night shift and leaving it cold soaking in the employee parking lot on the Jordanelle side, the REX will not start sometimes. Also going to the movies and then trying to start on the way home we have had issues. Obviously we are talking -10deg sometimes so it is cold. We have been using 91OCT ethanol free but I am starting to think we should go with the 88OCT with ethanol which should start easier. Heck the more ethanol the netter if light off is the issue. E85 might be even better?
Unfortunately, I do not live in Park City though I visit often and am very familiar with the area (we rent a house or condo for a month during the summer there-escape the valley heat). I live up at the top of the Bountiful bench, so my elevation is more like ~5500 rather than 6000, I rounded up to make a bit of a point. The recent snow storm left me unable to go anywhere on Wednesday, and when I did drive down on Thursday, there was definitely a bunch more up at our house than down by I-15. I've been to a couple of receptions at the St. Regis, though always from the Deer Valley side. In the valley there are more fuel options, I can get ethanol free in both 88 and 91 octane varieties. I'm not sure how E10 affects winter starting, but my guess is that it might make it easier, it seems like most of the mainstream gas stations around here have winter-mix fuel which has additives for cold starting.
Once I get the REx engine running, I'm home free. I can even clear the check engine light, and it will not come back on... until the next cold soak start. If you get stuck somewhere where the REx isn't wanting to start, try the emissions testing mode (http://www.mybmwi3.com/forum/viewtopic.php?t=2075
). The great thing about this is you can attempt to start it multiple times with that, where as when doing normal driving with the REx, it only tries once to start.