Well one minor detail to report:
I've been using exclusively E-0 gas for about 8 months. Why? Because it has always been less than 10 cents per gallon more, often the same exact price, and sometimes even dramatically cheaper than E-10 at one nearby station. Proof:
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Well, the 8 months of the E-0 price not changing a single penny and the profit bleeding finally made someone running that station open their eyes and jack up the price. Party's over. So the most recent fill-up I used E-10. It ran perfectly fine on the way home (which is about 12 miles from this station). I've been using my other car for the last 5 days straight. When I went to start this car again on Thanksgiving after sitting almost a week. I was greeted with a dramatic rough idle. Perfectly rhythmic. So I shut it down after about 10 seconds (delayed reaction due to being surprised by it). I waited about 15 seconds and tried again. Same result, but this time after about 5 seconds it was accompanied by a check engine light. So I shut it off and grabbed my code reader...P0301: Cylinder 1 misfire. I was in a bit of a hurry because I was running late for Thanksgiving, so I just unhooked it and restarted again to see if it would go away. Sure enough, after about 5 seconds it instantly cured itself and returned to running like a brand new car as usual. I didn't clear the code. I drove it about 30 miles one-way, and then later back again. No issues at all. On Friday, I ran some errands and while driving, the check engine light disappeared. Hasn't been back since, and hasn't misfired even once. So I'm 100% convinced it just got accustomed to prime rib (E-0) and advanced the timing rather aggressively due to the steady diet. It just threw a fit on it's first taste of ramen (E-10) and took it a few bites to retard the timing again.
I'm still standing firm on my plug choice as being problem-free. Fight me.
