[AT] unleaded gas

[Chris Britton]

I always thought tetra ethyl lead was added for octane enhancement / 
preventing spark knock ( pre-detonation.. not valve lube.. etc???

Soundguy

>Of course, when they took the lead out of gasoline, all the old
> car/truck/tractor/boat engines would have their valves burn up the next
> day. That didn't happen either. But people still buy "lead substitute"
> to add to their gas.
>
> Mike