Just got my Superchips Flashpac two days ago. I have been running the tow tune with 87 octane gas. I don't think that I'm having any pinging, but how can I tell for sure? Also, the 87 octane I am using is the kind without ethanol in it, not the 87 with 10% ethanol. Will I be ok? The fuel that we have around here are 87 w/10% ethanol, 87 w/o ethanol, and 91 w/10% ethanol. Not many stations even have 93 octane around here. I was thinking that maybe the elevation is different were I live and the 87 w/o ethanol(mid grade) is equivalent to the to 91 octane (mid grade) where Superchips does there testing? I just don't want to do any major harm to my engine. Thanks

 

Right now, I think nearly all gas stations use 10% ethanol. I run 87 with 10% ethanol in mine with 87 tune. So far, I don't think there's a problem. I am deaf so I can't hear pinging. So as of late... I am just running 89 octane with my 87 tune.

 

Most stations around here state at the pump that the mid grade 87 has no ethanol

 

I run the tow tune and have no pinging with 87.

 

Just curious if you noticed a difference between the 87 tune and the tow?

 

For me (4door, auto, 5.13's, 35's, colorado altitude),

The 87 tune/gas was no different than the basic ProCal calibration for seat of the pants performance. I did pick up a bit of freeway mpg though.

The 91 tune/gas was actually worse performance than 87.

The tow tune with 91 was by far the best performance for me. (shift points, maybe?) I ran tow with 87 for 2 weeks, and it wasn't much different than tow/91. No issues with pinging, but went back to 91 'just in case'.

 

How would Someone know if they have a pinging issue? Sorry If that is a dumb question.

 

your jeep engine would sound like its knocking on your front door.

 

Not to mention the check engine light coming on and the trouble code of multiple cylinder misfire! (yeah, I wasn't thinking)

 

So, everyone that has had pinging issues had the check engine light come on? Also, who is the superchips rep on this forum? I am not getting my activation email for the superchips site forum.