That is called "road timing you car". I do the same thing. Paul In a message dated 5/25/2004 3:59:16 PM Eastern Daylight Time, mechimike@xxxxxxxxx writes: > > > I was actually thinking about this when i read the > post by the fellow who paid $90 for a tank of 100 > octane fuel. I've owned 2 1967's, and neither one of > them had a problem drinking 93 (or 92, when I drove > into Pennsylvania). Its all a matter of timing. For > both of my '67's, I drove them for a while with a > distributor clamp wrench in the door compartment, and > if I heard them ping, I would retard the timing a bit. > Of course, this requires an initial setting that's a > bit advanced, and a little guess and checking. But > its really the only way to set time on cars of this > vintage. In fact, I have a '68 volvo who's shop > manual specifically calls this procedure out. It also > says to drive at about 30-40 mph in top gear up a > moderate hill, accelerate, and listen for pinging > ("pinking" they call it...bloody Europeans!) > > The only time I run any sort of lead additive is in > this same volvo, and only when I'm rallying > it...Unless anyone here drives their Imperial that > hard, I wouldn't worry about adding anything to the > fuel. > > > > I own a 67 Crown convertible > > > Does anyone know if adding a lead additive (into a > > full tank of gas) everyother fill up or or once in a > > while is helpfull or beneficial for the engine and > > or performance?? Is it good--or is it just a waste? > > > I always use premium grade (and go to different > > gas > > > stations) > > > THANKYOU > > > ANTHONY BUNGARO > > > >