[s-cars] Toluene [ Yikes! ]

[Charlie Smith]

Forwarded message:
>
> The Q&A for figuring octane is:
>
>   -----
> Q: How much toluene should I use per tank of gas?
>
> A: Octane ratings can be very easily calculated by simple averaging.
> For example, the tank of an Audi A4 1.8TQ is 15.6 gallons. Filling
> it with 14.6 gallons of 92 octane and 1 gallon of toluene (114 octane)
> will yield a fuel mix of:
>
>  (14.6 * 92) + (1 * 114) / 15.6 = 93.4 octane
>   -----
>
> What this works out to, for octane of the mixture - is as follows:
>
> (gal of gasoline * octane of gasoline) * (gal of toluene * 114) / tanksize
                                         ^
Boy, I got that wrong!                   ^
  (gal of gasoline * octane of gasoline) + (gal of toluene * 114) / tanksize

                            Make that a [+], not a [*].

    - Charlie