Originally Posted by Flav_cool
I gotta use 94 cause of the chip, but I hate to think that I'm getting 10%+ less fuel economy b/c of the ethanol
MarkD actually told me I can try running 91 and if it works (no pinging), it should be fine. Now my car has a knock sensor so I don't think it would ever actually ping. On my old engine I was using 91 no problem with the chip. The one time I tried it on my new car with the chip, it was sputtering a bit (reducing power?) but I believe it was petro canada 91, which people have said is shit.
Jay, can you respond to this please?
Other than fuel economy, what's bad about ethanol being present?