My car is travelling back in time

[LochnarITB]

There really is no way to say that any one thing contributed to the better emmissions. Although I never applied it to an occupation, my college degree was in mechanical engineering and the emphasis was on power and propulsion. I had a bunch of classes on what happens inside the engine. Combustion is a very complicated chemical process. Super computers have been focused on modeling the process to try to truly understand it. Things such as fuel, impurities and mixture go into the results. The vessel for the combustion (the cylinder, piston and head) also affect it. The movement caused by head geometry can promote better consumption of the fuel resulting in a cleaner burn. One other thing that I suspect may have happened in your case is buildup. Byproducts like carbon and impurities cake on the piston and the head. This can cause hot spots which provide extra latent heat which further affects the chemistry. If I remember right, the emmission most affected in this scenario is nitrous oxide. Also, as the engine wears, the rings can actually do a better job of seating meaning that fewer molecules of oil remain to be burned off when the mixture fires.

Of course, it could also be that the techs didn't push the right button, but I do like the time traveling theory better. If you can influence the time travel of vehicles, could you please warp my Honda CRX back out of the junk yard and to a point prior to the drivers side floor pan disappearing and the rear bumper falling off? It would be much appreciated.