So in my prior thread I wrote about sputtering, occasional stalling and rough idle. I attempted to remedy it by putting in 91 octane gas.
I know there was a lot of discussion about octane rating and its affects on performance.. and with due dilligence I read the entire 8 pages on this forum, 12 or so pages in the Magnum forum and talked to my service advisor. None gave me any deffinitive answers so here is my experiment and results:
*** warning***
My experiences, described here, are my own only. This descripion does not purport to give advice nor technical assitance, nor is this approved by Daihmler-Chrysler Inc. in any way.
I had put in 91 octane and immidiately felt sluggish performance. The knocking and rough idle did not go away, if anything they became worse. Off the start the car seemed to be struggling, the usual accelaration was not there and other then the sluggish perfomance I felt no benefit.
When the tank went empty I filled it with a good 89 gas (good being not the el-cheapo gas station or Costco gas I usually put in the car). I used Chevron premium 89.
Immidiately upon starting the car I noticed that rough idle was gone. The car became buttery smooth, no sputtering, no rough idle. Accelartion was back in full force, no hesitation, no problems. The car just felt like it came alive.
Mind you no scietific evidence of this can be provided other then my over abused butt dyno, but I know that from now on I am putting quality 89 premium. No more experiments with higher octane for me
Thanks.
-Paul
I know there was a lot of discussion about octane rating and its affects on performance.. and with due dilligence I read the entire 8 pages on this forum, 12 or so pages in the Magnum forum and talked to my service advisor. None gave me any deffinitive answers so here is my experiment and results:
*** warning***
My experiences, described here, are my own only. This descripion does not purport to give advice nor technical assitance, nor is this approved by Daihmler-Chrysler Inc. in any way.
I had put in 91 octane and immidiately felt sluggish performance. The knocking and rough idle did not go away, if anything they became worse. Off the start the car seemed to be struggling, the usual accelaration was not there and other then the sluggish perfomance I felt no benefit.
When the tank went empty I filled it with a good 89 gas (good being not the el-cheapo gas station or Costco gas I usually put in the car). I used Chevron premium 89.
Immidiately upon starting the car I noticed that rough idle was gone. The car became buttery smooth, no sputtering, no rough idle. Accelartion was back in full force, no hesitation, no problems. The car just felt like it came alive.
Mind you no scietific evidence of this can be provided other then my over abused butt dyno, but I know that from now on I am putting quality 89 premium. No more experiments with higher octane for me
Thanks.
-Paul