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1. Leaded Petrol was known to be harmful for a long time. In fact, some TEL Additives were very pointedly marketed as 'Ethyl' and did their best to leave the 'L
by to11mtm 4y ago
1. Leaded Petrol was known to be harmful for a long time. In fact, some TEL Additives were very pointedly marketed as 'Ethyl' and did their best to leave the 'Lead' part out.
2. Ethanol was known to have Anti-knock properties at the time. The only advantage of TEL was that it helped the life of the valvetrain... oh and it was patentable.
- stametseater 4y agoThe valve thing is urban legend, insofar as there's no evidence that TEL mitigating valve seat damage was a known phenomena before the 1960s. So mitigating valve seat recession was not the motivation of TEL when TEL was adopted and only became a motivation for keeping TEL decades later when the effect was discovered.
- eptcyka 4y agoLeaded petrol was known to be harmful by the very person who drove the manufacturing process. People working with the stuff were known to not last.