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Pontiac Forum: Ventura 1973 350 fuel additive
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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 online now
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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.
1971 GTO 455 HO Ram Air
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Old October 9th, 2018, 02:44 PM
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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.
2009 G8 GT
2006 Mallet LS2 Solstice
1978 Catalina Safari Buick 350 TH350
1978 Sunbird Safari Buick 3.8 2004R
1977 Astre Formula 215 Buick V8 T-5
1973 Lemans Safari 400 4-speed (factory)
1971 Catalina Freeway Enforcer 455 TH400
1969 Firebird Sprint 301 OHC-6 T-5
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