nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqarg97rd2xkmv2pdv5rf65hphxz3qn6jm79tanf8azu0rng9eltuq25gmuw even in my collection of old motoring / mechanics books (from various points in 20th century) they warn that too much lead caused problems with engines and other additives were used to c...