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Originally Posted by Big-Foot
......Problems in running a mix of leaded / un-leaded -
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Quote:
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Originally Posted by Big-Foot
The lead will foul o2 sensors as well as poisoning the catalytic convertor with repeated use. o2 sensors will clean themselves (by heat) if not fed a continous diet of lead. Catalytic convertors will not fully recover and they will produce less output heat. The lower output heat will cause the secondary o2 sensor to set a code in the ECU indicating that the engine is not running efficiently. This will ultimately turn on the SES light on the dash.
The final problem is that it's actually illegal to introduce leaded fuel (except in the case of an emergency) to a vehicle driven on public roads that was designed to run un-leaded fuel.
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I think you missed an important reason lead is not good, that is it poisons the environment not to mention the people and especially children who have to breathe the lead polluted air.