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88K5 Enthusiast

88K5

Posted
Posted

Just curious as to what octane everyone is running in there 6.2L I use 87 in the winter and 93 in the summer. Figure the cool/dense air in the winter makes up for lost hp of the 87 octane.

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted

85% of the time E-85 and the other 15% 93 octane

L29er Senior Enthusiast

L29er

Posted
Posted

Shell Vpower 91, but the wife has been commuting to work, can`t see the wrong in 87 doing just that. :D

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted
93 mine says premium only

 

?

 

Should be flex fuel or recommended 93

ShimanoFisherman Enthusiast

ShimanoFisherman

Posted
Posted

Usually I run 93 Chevron. But apparently they're more proud than usual of their additives and they're $.20/gal higher than Exxon around here for Supreme. So i'm probably about to change.

becker87 Senior Enthusiast

becker87

Posted
Posted

Mine is tuned for 91 octane, so i try to only put that in, but it is not available everywhere here in ND. I may try to use some E-85 now that gas has gone up so much.

 

On a side note. To run E-85 would it be better to put the stock tune back in, or do you think it would be better to leave the 91 octane tune in while running E-85?

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
Posted

For the tune mine runs the same on E85 and 93. I sent files to Justin to compare as I had mine tuned with E85 and he stated there was no adjustments he would make.

Egghaus Enthusiast

Egghaus

Posted
Posted

I use Shell V-power 91 or Esso (Exxon-Mobil) 91. Some stations in my area carry 94 octane but I'm never near them when I fill up.

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