Sometimes it can... espically for NOx readings, if you have lean Injectors, that causes higher cylinder temperatures which creates NOx emissions. My fail isnt too far off so I believe that it may work... Well see, Im also going to use chevron because the techron additive is the best out there.DCaff300ZX wrote:I also like Lucas upper cylinder lubricant in the tank, as it definitely helps the injectors operate better and improves fuel mileage and how smooth the engine runs.
It may or may not help emissions, but it does help the injectors a lot.