Ive seen 91 non-oxy fuel at a couple BP's around town, and was wondering what the non-oxy means/does. Is it higher octane essentially? Does anyone run this fuel? Just curious if there are any advantages or disadvantages. Thanks.
I've read that you get better milage, but also read the opposite. Anyone know for sure? Wondering if our Subies would like that fuel more than 93 with ethanol?
https://www.revisor.leg.state.mn.us/statutes/?id=239.791 Take note of the exemptions starting with subdivision 10. I didn't see any specific for Subarus. I have been under the impression that non-oxygenated fuel is allowed to be used only in certain cases and that regular passenger car use is not one of those cases.
Tru dat. From my understanding it is to be run in "off road vehicles"....ATV's, snowmobiles, mowers, etc. (and subarus of course because rally cars)
I'm pretty sure I read on Cobb's website that their OTS tunes are meant to contain at least 5-10% ethanol to be safe. I run non-oxy in my race bike and dirt bikes.
This is the most important line of the law regarding non-oxy fuel. Feel free to use it in your car if it's at least 20 years old! (I use it in my '91 Supra whenever I can.)
I will do my best to do as much of this....(see below) as possible. Non-oxygenated fuel doesn't break down as quickly because it doesn't absorb moisture like Oxygenated fuel does. This is because it doesnt have ethanol in it like @KA-T_240 said. On a daily driver modern car, it makes no sense to run Non-Oxy fuel.
I ran a half tank of 91 non-oxy this week in the STi. I was near empty and it was the only station close. Car ran just fine, pulled pretty hard in fact. Mileage was terrible though.
I kept going back and forth, and evey time I filled up with the other one, I thought it felt better. I switched permanently to 93 now because I got a bad tank of 91 last fall. My knock readings were over 60(arbitrary A'pexi Power FC number), and anything over 60 is not good. Never had a problem with 93, so I'm sticking with that.
The ethanol in the 93 actually increases the knock threshold/temps. If your car was tuned for oxy gas just stick with it. The non oxy really is intended for vehicles that may sit for some time between use, or for older cars whose rubber fuel components are not meant to handle the alchohol. On a good tune you should be able to run more boost/timing on e10 than non oxy
