http://sciam.com/article.cfm?chanID=...5F3705197C1D4F

 

the prefered octane rating is 89 though 87 is acceptable per the book. the octane rating itself signifies two things, the amount of no knock chemical(by ratio-the chemical name i can't remember at the moment) and the related flash point. 87 octane has a lower flashpoint than 89 and 89 vs 92 and so on. hope that helps
casper

 

what about octane boosters? Are they bad for my 5.9L 360? I run 91 because it's the highest i can get here in AZ so if i added a bottle of octane booster is it futile or a good idea? No SC yet but one to come soon.

 

I don't own one, either. My Ram has a 4.7L under the hood. But I looked it upby searching this forum.

 

man i ran some 110 the other day race fuel that **** was badass and expensive it was sweet truck ran like a raped ape got pretty hot though but was fine didnt overheat

 

Does the higher octane screw things up? I am not talking the 93 but the 110+.

Now, I definatly don't think that I am a chemist by any means (I got an "R" in high school chem... worse then an F, kinda like them telling you not to bothertaking it again, EVER), but I took this blue collared type class called Chemistry of Haz Mat for the firehouse. From what I remember, the word octane (8) comes from the chemical composition of C8H18... and the properties of the octane are based on the amount of carbon inside the chemical compound... more carbon more stable,and yields a higher amount of energy (propane has 3 carbons in the chain, resulting in a lower molecular weight being a gasand a lower boiling point, thus giving energy off earlier but not as much). So, the octane rating is the amount of octane compounds attached in the gasoline chemical compound (don't ask me what it is) and relates its properties to that compound. Soooo... if there are more octane compounds attached then there should be more energy and a higher ignition temp. I really need to stop drinking.

I hope there is a chemist on this site that will set me straight because I am probably wrong.

 

[sm=confused06.gif]hmmm what he said lol

 

Like I said, I need to stop drinking... this **** just comes to me in my altered mental status.

 

Here, I just googled this page, kinda of blurry but a good explination of the principles of octane: http://chemistry.about.com/cs/howthi...a070401a_2.htm

Please tell me I don't sound like someone else on this site...

 

My 2003 book says to run midgrade 89 octane, and I also want to say to buy a quality gas like chevron or shell. I try to only buy from chevron.