Jim Davis says:

> ..... 1/2 of the "premium" gas sold in the USA is put into cars where it
does
> has no useful function, other than make additional profit for people in
the
> fuel business.
>
There is one use I've found for using "premium" petrol (gas) and that is to
stop pinking (pinging).  Sometimes a 1/4 tank of premium with the rest
standard will do the trick.  This is cheaper than damaging the engine which
may be coked up, too far advanced or running too hot.

My two cents

Jack Newton
'89 Transporter