|This is regarding Pre-mix concerns with diluting gas. It includes posts from Brian D. Cain and Ted Koseki from K2RD.
--- "Brian D. Cain" <email@example.com> wrote:
> Quick reminder again -> Unrelated, but who cares. :-p
Yep, off-topic alert. :P
> I don't believe so, Eric. One, it's such a small ratio and it burns easily
> in the combustion chamber. Secondly,
> in reference to the Mazda Rx7's oil metering setup, you're shooting a ~220:1
> ratio of 4-stroke motor oil into the chambers. I ask you rhetorically ->
> which one lowers octane rating more? Somebody like Ted would know more about
> this in specific than I would.
Adding ANYTHING other than the cyclohexane family of aromatics or some of the
more exotic fuels (i.e. nitromethane) will lower octane. Remember, octane is a
fuel's ability to supress pre-ignition - it really has nothing to do with power
With that said and done, adding motor oil or pre-mix will lower octane, period.
Pre-mix is designed to burn cleanly, so it won't affect octane as much as
motor oil does.
We usually recommend to run about 150:1 ratio for street, minimum. Race ratios
are 100:1 - 75:1 ratios, minimum.
Ted Koseki K2RD Racing Development
firstname.lastname@example.org Founded since 1999
<http://rx7.foci.com/tkoseki> "No excuses..."