<VV> Octane Number

[Dave Keillor]

The octane ratings posted on pumps today can't be directly compared with
the octane ratings back in the gud-ole-daze (pre-70s).  In those days, the
octane ratings used the RON method of measurement, today it's (RON +
MON)/2.  Since RON generally yields the higher octane number, today's
numbers are a few points lower than those of yesteryear.

(RON = Research Octane Number; MON = Motor Octane Number)

Dave Keillor

On Wed, Apr 25, 2012 at 11:46 AM, <hallgrenn at aol.com> wrote:

>
> And the 95 HP engine is supposed to get 89 octane.  I don't believe any of
> our engines were designed to run on 87 octane fuel.  We just get by with it
> (sometimes).
>
> Bob
>
>
>