Simonson - SIMONSON
1409 2nd Ave W, Williston ND
701-572-1880
Ethanol-free octane ratings: 91
GPS coordinates: N 48.15792 W 103.62597 (located from address)
Updated by J.C., June 20, 2014 22:58 CDT
The two lower grades are E10. The Premium grade is Ethanol free, and stickered as such. I use it in my bike and my plane.
Updated by Booger, October 17, 2013 17:19 CDT
E10 for 87 and 90
Updated by Jonathan Lathbury, June 27, 2013 7:20 CDT
Added phone number.
Updated by Byron Pyburn, June 02, 2013 20:05 CDT
All their gas pumps recently placed 10% Ethenol stickers on them. June 1, 2013.
Posted by mygeneral, June 03, 2012 7:57 CDT
They claim their 87 & 91 are pure gas, but is still untested. Somebody help out here?