Premium doesn't burn any slower.  It just has additives in it to increase octane for the purpose of resisting detonation,

Detonation (not pre-ignition) happens very shortly after the spark plug ignites the mixture.  The mixture starts burning,.. a flame front starts heading out from the spark, but before all the mixture is burned, the remaining (unburned as yet) mixture explodes all at once due to heat and/or pressure.  

Higher octane fuels simply have additives (or are refined in such a way) that resists detonation.  IOW, it takes an even higher pressure or temp to explode the remaining mixture all at once.  

Premium fuels actually have a tiny bit less energy.  They are used, however, in engines with higher compression so the engine makes more power with the premium fuel because it won't detonate as easily as regular.

This discussion is mostly moot.  The Savage works best on regular gas, and has such a low compression ratio it'll even burn crappy third-world gas which probably has less than 87 octane.  Using midgrade or premium has no effect at all, save emptying your wallet sooner.  For 99% of us, we can forget about this discussion altogether, and just blissfully live out the rest of our lives buying regular gas.

Gyrobob wrote on 09/04/12 at 12:06:30:

I know what 93 octane gas is use for,You are misinformed and much as Dave and Cave

bill67 wrote on 09/04/12 at 14:36:50:

Its been that way for years.

bill67 wrote on 09/04/12 at 05:10:56:

This is what I'm saying

Bill still doesn't know how to use the proper contraction of "you" and "are" but he's trying to say we're unreliable sources.

He still hasn't attempted to prove his point either.

Here is one of my posts where I summed up what octane is.
Cavi Mike wrote on 04/22/12 at 13:04:20:


With that knowledge you may now want to know exactly what the point of high-octane gas is if it doesn't have these mythical magical properties that people like bill claim they have.

Engines are able to generate power by compressing a fuel-mixture before igniting it. The more you can compress your air-fuel mixture, the more power you can extract from it. That's why high-performance engines have high compression ratios. Unfortunately, low-octane fuel will auto-ignite aka 'detonate' in a high-compression engine. This is where high-octane fuels come into play.

Bumping the octane rating with additives or with a better fuel means you can compress that mixture more and get more power. But you MUST compress that mixture more or else you won't get any benefits. Usually, you get adverse negative side-effects like lower gas-mileage, carbon-deposits, clogged O2 sensors and catalysts.

Ignorance is an OK excuse for running high-octane in an engine not designed for it but once this has been explained to you (bill) multiple times, there is no more excuse for continuing to spew misinformation. Your naivety has become inexcusable.

Here is a Myth/Fact about fuels directly from an oil company.  Higher Octane gasoline does not burn slower.  The Octane simply makes it harder to ignite, thus the less tendency to knock with higher compression engines and/or more advanced timing.

MYTH: The higher the octane, the slower the burn.

FACT: In many cases, high octane gasoline has faster burning characteristics than low octane gasoline . It is rarely slower.

http://www.whitfieldoil.com/www/docs/171.267/vp-racing-fuel-

Nope no need to.  Compression ratio is no where near the need for a high octane fuel.

R.F.