Performance Forums > V6 or Straight 6 Engines

Engine lead additive?

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48bomber:
Hi all,
  Light snow today!
 
  In a box that came with the b12 , there was a empty container of fuel additive for engines that would have had leaded gas. I think in 1948 it was leaded fuel , so I wonder what people are doing with todays fuel. Is there concern for our old engines?
  48bomber

oldsledz:
I go to my local airport with a few gas cans and get 100 octane low lead and blend it with premium unleaded.  The 100 is also the best form of stabil going.  I drain all the gas out of my antique snomobiles,  lawn mover etc  and put a gallon of that in and the next season,  they start like they ran yesterday.  As that fuel evaporates, it leaves no residue. Around here it is about a dollar a gallon more than premium.   Also,  you should be able to buy lead additive.

Oldsledz

48bomber:
Oldsledz,
  Thanks for the reply. I will investigate the auto parts store tomorow and see what is there. The local airport wont sell fuel , I have a friend that tryed for a car he had. Good idea if it was available.
  Any snow yet? We got enough th get the ski-doo renegage out of the trailer and arround the yard!!!
  48bomer

super:
this is an old topic, but if the cylinder head is ever rebuilt or upgraded, you should be able to use unleaded fuel with new valve and timing configurations

oldsledz:
I believe you can used unleaded fuel if you change to stainless steel valves and valve seats.  Lead was more commonly used and a lubricant for the valve train and also the amount of lead in the fuel dictated the flame spread of ignition at the spark plug .  I think the combustion temperatures are hotter in unleaded fuel than in the old leaded fuel.  Valve timing does not change,  but you may play with ignition timing. 

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