On 28 Sep 2005 07:06:21 -0700, email@example.com
>I just purchased my first 'vintage' car and now I'm wondering if it
>will run on unleaded gas. will it or do I have to add some additive?
It should run just fine on unleaded fuel. I would suggest
the 89 octane. In my younger days when these were new cars,
many people felt that Amoco "white gas" which was their
premium was the best fuel for almost any car. It was
unleaded. We used it in anything that needed "high test"
and a lot of things that did not.
The problem with unleaded gas where hardened exhaust valve
seats are not installed is valve recession. This almost
never happens in engines which are not constantly subjected
to high RPM or heavy loads. My suggestion to you is to use
the 89 octane rated fuel and enjoy the car until there is a
problem which is unlikely. If it developes a problem
requiring valve work, that will be the time to install the
hardened valve seats. Any machine shop that can do a decent
valve job should be able to install the valve seats. The
benefit to this approach is all the free miles you will get
before it needs anything if ever. Just save the money until
or unless the job is needed and get some sleep. The cost
will be exactly the same if a problem developes as it is
right now when there is no problem.