RE: hardened valve seats

[Rich Kinsley <rlkinsley@xxxxxxxxx>]

spigot2039@xxxxxxxxxxx wrote:
> 
> We used to look for the top level Sunoco (260?) for high octane in 
> Mopars back then. Per the text snip below, that I assume is right, Amoco 
> white gas did not have lead but instead used other additives to provide 
> the valve protection.
> 
> "Back in the '60s, when most gas was leaded, Amoco had this special 
> super premium which was not leaded and was therefore safe for some uses 
> where leaded was not, and it also was much less likely to foul plugs in 
> motors which had a severe plug fouling problem, such as the early 
> Porsche 911 (I had a late '66 for a while in the '70s) and Ferrari V12 
> motors of the pre-smog control era, so it was much sought after by 
> owners of high-performance machinery, including modified American 
> "super" cars. I doubt that it would be any different from the current 93 
> octane unleaded in practical applications, if it were still on the 
> market, except that some of the other additives that Amoco used instead 
> of lead have now been banned, too.
> 
> Addendum: Amoco's early unleaded premium is NOT the same as the "white 
> gas" meant for lanterns, camp stoves, and torches, which was a form of 
> light distillate, similar to the cheap fuel sold for specially equipped 
> farm tractors during the Depression and WWII years. It was almost as 
> dangerous to use the Amoco premium for those purposes as any other 
> gasoline because of the explosion danger and the other additives."
> http://www.mercedesshop.com/shopforum/archive/index.php/t-47287.html
> 
> Gary H.
> 
> 
> -----Original Message-----
> >From: David orr <fe2orr@xxxxxxxxxxxxxx>
>  
> >
> >I have wondered about this for years as when I had my first new car in 
> >1964, 
> >a 383 4bbl. 4spd. , that I drove at the drags most every week end  or 
> >from 
> >N.C. to Pa. other week end. I used AMOCO white gas unleaded it worked 
> >fine. 
> >what is the diffenance between the unleaded of 1964 and the unleaded of 
> >now. 
> >I use 93 octane with an additive in my 64 426 street wedge with no 
> >problems. 
> >dave O 
====================================================================
I was in CA back  then and I don't remember that we had AMOCO out there. 
I think Chevron was their counterpart. That's pretty interesting.


Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies


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