Installed my Reinhart Chip

[ripped camel]

you realize those ratings are a "minimum".

I'd inspected millions of gallons of gasoline over the years and (98% of the time) 93 octane is usually in the high 94s or 95 octane

i have never tested 91 octane that wasnt 92 or 93 octane.

remember what you see on the pump is the AVERAGE of the"knock motor octane number" (MON) which is a physical test and the "research octane number"(RON) based on a computer model and chemistry
you should see something like MON/RON on the sticker on the pump

so if it SAYS 91 octane rest assured its 92 or 93, unless you get it from a crappy company like citgo.

the BIG3 gas companies ALWAYS test higher than they are rated, in case a delivery truck "cross dumps" they dont want to lose a full fuel load.

crappy, unfranchised gas stations buy the fuel that didnt pass the test.
these crappy station often SKIRT the minimum ratings, which is where the
"bad gas complaints" come from

That was a really informative post. Sometime XLR you come out of the woodwork with some Einstein like lesson.

 

[JDS353]

i have heard that mixing fuel octane will give higher numbers. but that said run 91+ and save the engine. also run at least 3 tanks before trying to set a base or feeling. try using a gps handheld with a g meter built in there are a couple out there. also helpful to check the speedometer reading. Michael 94M5 sould have his chip installed he changed from the 410's to 373's

 

[XLRVIII]

to get around the 3-5 tank full wait

fill it up with 93
disconnect the battery overnight

that will clear the adaptive memory, and allo the pcm to re-learn its spark curve

 

[XLRVIII]

That was a really informative post. Sometime XLR you come out of the woodwork with some Einstein like lesson.

thanks!

..i'll freely admit, i have my moments from each end of the spectrum