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Drink15 t1_ja4zrsq wrote

Reply to comment by supreme_harmony in If the fuel that goes in car engines is extracted from hydrocarbons, which consist of only Hydrogen and Carbon, and those hydrocarbons react with Oxygen in the air (combustion reaction), to produce CO2 and H2O, why do we get a bad smell from car exhaust fumes if both gases are odorless? by Protoflare

There is also oil that get past the seals and burns with everything else. It’s a small amount in new cars but increases as motor wears

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