Gas Grade...

[Icecobra]

And you think that just because the entire cylinder worth of fuel doesn't go off at the wrong time that individual drops of fuel don't as well? Every time the piston goes through a power stroke there are small amounts of misfire, higher octane fuel helps to lessen the amount of misfire because it is more stable, which is why it has to be used in higher compression ratio engines to prevent pre-ignition, this increases the usable amount of fuel in the cylinder, which means you can get more power out of each power stroke, it doesn't matter whether you're running 8:1 compression or 12:1 compression, better (more stable) fuel always helps

Ok no talking science with you....

 

[Cleave]

I don't see what science I'm missing, if you can burn one fuel more efficiently than another, it doesn't matter that both produce the same amount of BTUs, the one you burn more efficiently will produce more power

 

[Icecobra]

They burn the exact same when ignited... and drop lets of gasoline do not burn only the vapor burns so it burns the same no matter what octane.....

 

[Wilson]

So what your saying is your farting gas out of the tail pipe. So that is a good reason to use ethanol it's non toxic.
I use e-30 in everything I own so how would you know it's bad if you don't. I do not own a flex fuel so if its bad its lol not bad enough to harm anything over 160,000 on 2008 van over 200,000 on 2006 impala over 5,000 on 2011 can-am plus I pay 10 cents less than 87 octane and e-30 is about 95 or so octane. I use it and the power increase is noticeable.

 

[Dkyle1220]

My step dad used to work at a refinery, from what he's told me you really get screwed buying premium, apparently when they are refining gasoline sometimes 91 is the cheapest to Make so they send it down the pipe and sell it as 87.

 

[dataustin]

Shell 87 octane all the way!

 

[BIRDMAN]

Is this real?

 

[Cleave]

That is true dkyle, the octane ratings on the pump is the minimum rating of the fuel dispensed, so 91 can be as much as 97 octane, but it will be at minimum 91 octane, and usually the premium grade will be a higher octane than any of the other grades even if the 87 is coming out as 91, and ice, I like that you like to live in the land of fairies and unicorns where all the fuel that is put into the cylinder is combusted no matter what the conditions are, but here in the real world where I measure how much fuel actually burns inside the cylinder, you do not burn all the fuel that goes into the cylinder, and you never even burn the same amount of fuel from one stroke to the next, even when the exact same amount of fuel is put into the cylinder, and the stability of a fuel is one of the most important factors in how much is burned, any engine running 91 octane will put out less emissions than an engine running 87, this means that less unburnt and partially burnt fuel is going out the tail pipe, which means the fuel that would've come out unburnt or partially burnt running 87 was burned completely when running 91, use logic, if a fuel starts preigniting at a certain compression ratio doesn't it make sense that it would burn less stably at a compression ratio under that preignition ratio than a fuel that starts preigniting at a much higher compression ratio being run at the same compression ratio, the cr at which they start preigniting is not a cut off line, they start burning unstably long before that and get gradually worse until they hit that cr and start preigniting

 

[Wilson]

In other words e-30 rocks

 

[Cleave]

Ice, I don't care what gas you run, and it's okay that you use generally accepted ideas for yourself, but I'm putting out not just ideas, but what I've witnessed, and we should allow the other members to look at what we've said and determine for themselves what they should use, and trying to say I'm ignorant has no merit in a discussion just because I don't agree with your ideas, I'm done with this discussion