Aquamist HFS-3 and MINI Tank GB

[ThumperGP]

(09-01-2011 12:07 PM)Buli Wrote:  It is not knocking from 91 octane, it is knocking from the change from 93 to 91. It seems to take a tank or more to stop. This has happened all 3 times I couldn't get to the station that has the 93. The knocks happen on a hot day, AC on at idle after I changed from 93 to 91 octane. Maybe that points to a problem with my car.

Good to know about the lower risk with a none meth tune.

Still though, it should not knock from a 2 point drop in octane, especially at idle when there is 0 load. I've gone from 101 octane back to 91 which is much more of a dramatic drop, and didn't experience knocking issues. (except when my HPFP was dying)