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Discussion Starter · #1 ·
Just acquired a 1977 320i with 100k miles on it, It's in very good shape and was well taken care of. The previous owners, same family owned it since it was new - went from the father to the daughter, put lead additive in the gas with every (most) fillups. Is this necessary? What happens if I discontinue doing this?
 

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You will burn the valve seats out...if you dont keep adding the additive, you can have it adjusted to run on unleaded, think they do something to the timing, I cant really remember,long time since I had one done.
 
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