tomwallace Posted May 16, 2006 Share Posted May 16, 2006 I a restoring a 1936 Buick Century. It is essentially original.What is the present thinking on the use of lead additive for the gas??I have heard differing opinions. Some say it will protect the valve seats if they have not been replaced or upgraded to a harder metal.What does everyone think?Tom Wallace, Dayton, Ohio Link to comment Share on other sites More sharing options...
The Old Guy Posted May 16, 2006 Share Posted May 16, 2006 Everyone has their own ideas, and there are many different opinions. I have a 1940 that I have driven ove 102,000 miles in the last 30 years, and it has never had any additives in the gas, and it still rins just fine. I am sure you will find people on this board that have had problems, so let your conscience be your guide. Link to comment Share on other sites More sharing options...
critterpainter Posted May 17, 2006 Share Posted May 17, 2006 IF that engine was 9.5:1 or so compression then you would have an issue with valve recession with unleaded gas. Since that is a 36 I don't think you have a problem as your compression ratio is quite low. I don't know of anyone that has has valve falure due to running unleaded.Bill Link to comment Share on other sites More sharing options...
Matt Harwood Posted May 18, 2006 Share Posted May 18, 2006 Automotive Myths Hope it helps! Link to comment Share on other sites More sharing options...
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