12-26-2014, 01:32 AM
(12-25-2014, 11:53 AM)the_undecider_imp Wrote: There is more gasoline in one gallon of 87 than 93 octane. That is because they use additives to increase the octane rating. I never run higher octane than specified unless it's my old truck. It's got a little higher compression than stock thanks to 140,000 miles of carbon build up.
Reflashing the computer will advance timing and may require higher octane to prevent predetonation. I reflashed my 2013 Mustang and had various tunes with various octane requirements.
Some cars can tell what octane is being used and adjust parameters accordingly. Advertised power ratings are sometimes based on premium grade fuel. I would assume the ECU on the CB is relatively simple and doesn't adapt in this manner.
Sorry, but that's an "old wive's tale." I worked in a refinery for 33 years, and they use different blend stock material for a low octane blend as opposed to a high octane blend. "Additives" don't figure into it during the blending process, they're added at the truck loading rack.