I posed the question (and the poll) to see if the new 1.5L turbo motor is octane sensitive. The r18a motor in my '13 EX-L is oblivious to octane after an extended test with 93 E10. I am wondering if this is going to be true with the new engine in the Civic. My curiosity comes from watching the 1.4L turbo motor in the first generation Cruze. That motor was horribly sensitive to octane rating. The Cruze OM said 87 E10 was the requisite fuel, but the engine had several issues with it in high altitudes, heat, and loading. It would heat soak easily, have to turn off the A/C in the heat, and would pull timing so much that acceleration was nearly dangerous. 91 E10 would fix the problems, or you could spend $600 for an aftermarket tune. I'm watching to see (make sure) the new Civic doesn't have those sorts of issues before I consider purchase of one.
2013 CBP EX-L sedan w/Navi.: K&N Drop In
33,333 Mi.;Avg MPG:33 city;44 hiway;87 E10;ECON On
46 mos. old, not a single problem, issue, or recall.
I've gone out to find myself. If I return before I get back, have me wait for me.
87,956 more Civics than Cruzen in '13
52,921 more Civics than Cruzen in '14
108,782 more Civics than Cruzen, in'15
145,771 September '16 YTD