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Pontiac Forum: Ventura 1973 350 fuel additive
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  #1  
Old October 4th, 2018, 03:59 PM
TommyVentura TommyVentura is offline
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Ventura 1973 350 fuel additive

Should I use some kind of lead replacement for my 1973 Pontiac Ventura coupe 350cu V8?
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Old October 5th, 2018, 01:18 PM
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melsg5 melsg5 is offline
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why????????? Starting in 1971 GM went to hardened valve seats and since then it has been proven unless you really stress the engine, racing, pulling a trailer up a hill, etc. nothing happens to the seats due do to lack of lead.
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Old October 9th, 2018, 02:44 PM
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cammerjeff cammerjeff is offline
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It has proved to be a Myth, even the earlier 1970 and older V8 engine withstood the lead free gas 99% of the time. Don't waste your $$$ on any additives. Also the 1973 engine you have is a low compression engine, they do very well on modern gas,

What does not do well with modern gas are any original flexible fuel lines, and the accelerator pump seals in the Carb.
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