Leaded/Unleaded gas for 69 Mustang

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waterboy - 03 Sep 2006 17:38 GMT

Hi just purchase a 69 Mustang 302 engine. I believe I'm the third of
forth owner of the car. I don't know, and I cannot find out, from
previous owners, if the valve seat were change when the gas went from
Leaded to unleaded. I know that if the valve seat were not change you
can buy additive that you put in the gas along with the unleaded and I
certainly willing to do that and that is the same as leaded gas.

My question is, if the valve seat has been change and I put some
additive in with the unleaded will that be bad for the engine also

Has somebody have experience with that situation and could advise me.

Your co-operation in this matter is really appreciated.

Don

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Mark C. - 03 Sep 2006 18:32 GMT

> Hi just purchase a 69 Mustang 302 engine. I believe I'm the third of
> forth owner of the car. I don't know, and I cannot find out, from
[quoted text clipped - 11 lines]
>
> Don

Don, I'd just drive the car without using additives. If the engine has
several thousand miles on it It's probably going to need a rebuild before
the valves start having issues anyway. I've had no problems running old
stock engines without hardened exhaust seats although when I do rebuild an
engine, I always have them installed. It's a matter of longetivity. Using
additives on an engine with hardened seats installed will hurt your wallet
more than the engine.

Mark

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waterboy - 04 Sep 2006 02:14 GMT

> > Hi just purchase a 69 Mustang 302 engine. I believe I'm the third of
> > forth owner of the car. I don't know, and I cannot find out, from
[quoted text clipped - 21 lines]
>
> Mark

Thank you Mark for you advise. That is what I will do not worry about
it.

Don

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