Hey people. I have a question, us Californians don't have the luxury of 91+ octane. But my main question is, isn't the higher the octane the more power you will see? Because i look up a few places that sell 100 octane unleaded. I was thinking of mixing 5 gals of 91 and 5 gals of 100 to boost the octane level a little bit. I spoke to my tuner and he said my truck will advance the timing just a little to utilize the higher octane. but not enough for pure 100 octane.

any thoughts?

 

ive always heard you want the lowest octane possible without pinging, but with more octane you can tune for it and make more power

 

I always run 91 Octane. Don't know if I have been helping anything.

 

Here in Ca. our 91 is closer to other states 89 octane.

 

I wonder what my truck would do if I put in 86...

 

Probly a different story here in Canada. I've gone with it since day one, I don't know if it makes a difference, but it can't be hurting.

 

so no one thinks a mix of a 100 octane will help?

 

Don't you have 94 in Canada?

 

not unless you installed 14:1 pistons or just had a custom tune done, anythng higher than 87 is money down the drain, you always want to use the lowest octane you can without pinging.

 

The higher the octane, the lower the volatility is of the gas. The lower the octane the more volatile the gas is. High octane gas is designed for high compression engines or F/I engines, because the gas reaches it volatility later because of the compression inside of the combustion chamber. Low compression, with a engine designation of 87 octane or what is known as regular unleaded gasoline is for the vast majority of vehicles, because the gas is already at it's volatility rate sooner, thus making the engine able to burn all of it off.

The major factor in which you don't want to run high octane in your regular octane truck: You will run rich.

This will have that following negative effects:
-Running rich will allow more carbon deposits in the engine because the fuel is not being burnt correctly.
-Running rich does not allow for all of the gas to be burnt, thus harming your catylitic converters from excess unburnt gas going into them. As this causes the ceramic catalyst to break down, and eventually break up causing you to need to replace your converters sooner.
-Running rich will cost you more in the long run. Why? The amount of energy in 93 is 114,000 BTUs and the amount of energy in 87 is about 126,000 BTUs per gallon ratio.

So unless you have to run it... don't run it. It is causing more harm than good.

 

so even if i have a tune for 93 it wont help..

 

umm....am i the only one who thinks these two sentences are saying the exacpt opposite

 

Pretty sure its 91 up here. I always just take the highest octane at the pumps.


Doesn't the Edge Evo require you run higher octane when your on level 2 or 3? My truck is usually on level 3, so I run 91 Octane.

 

Even if you advance the timing, you still won't be getting the full effects from it. You might gain about 10 hp... but thats about it, realistically. How much more in the RWHP? Probably like 4 RWHP.

If that... it ain't much... but if you do have a tune, and can burn all of it without the truck running rich, then you are fine... but just be careful.

 

No, I am with you on that one. I read that about ten times and scratched my head.