View Single Post
Old 04-22-2020, 09:37 PM   #2 (permalink)
rmay635703
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,281

Silver - '10 Chevy Cobalt XFE
Thanks: 340
Thanked 646 Times in 481 Posts
In theory if you can find non-oxygenated ethanol free in a lower octane it should give the best fuel economy. (Iíve only seen it in MN)

Historically there were some comments that the Insight required higher octane overseas but generally 87 has more energy content.

Not sure which would win out, I guess if money is no object throw in some 0w16 oil and dose the tank with some MMO and run a separate tank of each.
Iím leaning toward 90 winning but only by a hair

Will be interesting to see your results.
  Reply With Quote