Ethanol In pumps ????

JWBFX4 · #1 Sun, February 15th, 2009, 04:59 PM

Quote:

Originally Posted by twintips_17

I know where im goign to get my fuel from now one!!!

I am actually surprised they offer surpreme without it since the others have it, but the question is, how long will it last that way:lookaround1:

twintips_17 · #2 Sun, February 15th, 2009, 05:07 PM

Quote:

Originally Posted by JWBFX4

I am actually surprised they offer surpreme without it since the others have it, but the question is, how long will it last that way:lookaround1:

A better question is how long is gas guna hover down where it is. Did you see how much 15 gallons of gas at 91 cost me.... LOL

It was over double that this date last year!!!

JWBFX4 · #3 Sun, February 15th, 2009, 05:22 PM

Quote:

Originally Posted by twintips_17

A better question is how long is gas guna hover down where it is. Did you see how much 15 gallons of gas at 91 cost me.... LOL

It was over double that this date last year!!!

Its been steadily creeping up down here, and just went up again today, I would guess we might have another month and half or so.

***Jackpine*** · #4 Sun, February 15th, 2009, 11:32 PM

Quote:

Originally Posted by JWBFX4

Its been steadily creeping up down here, and just went up again today, I would guess we might have another month and half or so.

Maybe a little longer, but, you KNOW it's gonna happen!

- Jack

twintips_17 · #5 Sun, February 15th, 2009, 11:41 PM

Quote:

Originally Posted by JackandJanet

Maybe a little longer, but, you KNOW it's gonna happen!

- Jack

OHHHH i cant wait.

It went down..... Its only gone up here.

Dfishrmn · #6 Thu, November 12th, 2009, 11:31 PM

Just to revive this issue! All the stations here are pumping gas with 10% ethanol now. Does this affect our tunes? I have heard that ethanol has a higher octane rating than pure gas. Should the timing be advanced or rewritten into the code?

***Jackpine*** · #7 Fri, November 13th, 2009, 10:43 AM

Quote:

Originally Posted by Dfishrmn

Just to revive this issue! All the stations here are pumping gas with 10% ethanol now. Does this affect our tunes? I have heard that ethanol has a higher octane rating than pure gas. Should the timing be advanced or rewritten into the code?

Ethanol DOES have a higher resistance to pre-ignition, which is what octane ratings are all about, but if the pump says 87 octane, that's its minimum antiknock rating. It COULD be higher, but it won't be less. And, I suppose you could try advancing the timing in small increments (i.e., 0.25) and see what happens.

However, I'm fairly certain the antiknock properties of gasoline are improved through the use of additives in the refining process that contribute to an increase in cost. I don't really see a refiner using those costly additives in the same way if the antiknock properties are improved by adding ethanol. So, I'd guess that the mere fact that gas is E10 has not improved its octane rating.

However, different brands CAN have slightly different octane ratings as long as they meet the minimum shown on the pump. You can experiment to find a brand that will let you advance the timing some. The trouble is, our trucks have anti-knock sensors built in to the system that will actually retard the timing if detonation is detected. So, advancing timing may actually be non-productive.

I know I tried advancing mine once, by 0.25, back when I had an Edge before it was converted to a Gryphon. I immediately noticed an uneven idle. I put the timing right back to "0".

- Jack