Do petrol engines produce more CO than diesls?

Yes, petrol engines generally produce more carbon monoxide (CO) than diesel engines. This is primarily due to the combustion process; petrol engines often operate at lower temperatures and can produce incomplete combustion, leading to higher CO emissions. In contrast, diesel engines operate at higher temperatures and pressures, which typically results in more complete combustion and lower CO emissions. However, diesel engines tend to emit higher levels of nitrogen oxides and particulate matter.