Re: Premium vs. Regular gas

[Scott Hinojos <lightsplicer@xxxxxxxxx>]

Octane rating is simply a fuel's ability to resist detonation. A fuel
with an octane rating of 87 doesn't have any less energy in it than a
fuel with a rating of 93, or even 101. But a fuel with a low octane
rating will detonate more easily (earlier) under compression.

A high-compression engine needs a fuel which resists detonation to run
properly, and allow the engine to control the combustion event timing
and shape. However, an engine with low compression isn't going to make
any more power with high-octane fuel. So, if your engine runs well on
87 octane, use that. I'll stick with 91 for my 10.5:1 383, thanks.
Plus, I don't have to concern myself with what ethanol will do to my
car, because the stations I buy fuel from leave ethanol out of the
premium stuff.

I'm not sure how leaded fuel came into the conversation later, but the
US and Canada haven't had leaded fuel available to the public for
decades.
-- 
~S~
'64 Chrysler 300, AKA: "Leon", 383, 727, 8 3/4
'62 Mercury Comet Custom wagon... a work-in-progress for too many years.

On Sun, Oct 14, 2012 at 11:29 PM, Cory Rempel <cory_383@xxxxxxxxxxx> wrote:
> Hey all.  A short while back there was a discussion about higher octane gas
> and how it's suppose to make your car perform better.  Well I'm here today
> to say that is utter B.S.  I put 3/4 of a tank of premium in my 65 Polara.
> The tank was pretty much bone dry, so it was like 98% premium fuel in the
> tank.  Premium gas in Canada is 91 octane regular is 87.  I've got a mildly
> built 440 in the car with a 25 gallon tank (95 litres).
>
> I figured, as per the discussion here, the higher octane would make my car
> perform at least a little better.  I'm saying NO WAY!!  Took it out for a
> good drive today and there was absolutely no difference in performance
> whatsoever.  Needless to say I was a little miffed.
>
> So I guess in a long winded way I'm asking everybody on this list if they
> got the same outcome when trying premium gas vs. regular gas?  After this
> little experiment I will NEVER buy premium again.  Especially at 15 cents
> per litre more.  That's 57 cents per gallon more.
>
> Thanks for letting me vent.
>
> Cory

-- 
-- 
--
Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!

1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
-- 
You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group.
http://groups.google.com/group/1962to1965mopars?hl=en.