Have you changed your air filter today?

[deathsled]

I changed out the old air filter on 843 and the engine seemed to liven up a bit more.  Has anyone experienced this?  Maybe it is psychosomatic on my end but it felt good to toss the old one.  It was quite dirty with no light passing through any of the element when held up to the light. 

[Steve McDonald Formally known as Mcdonas]

Depending on your driving habits and the climate where it is driven they can dirty fairly quickly.
The old "hold over the drop light" trick still works

[rhjanes]

On our daily drivers, about 3 or 4 times a year, I remove the air filters and drop them flat on the driveway.  Surprising how much dirt will drop out on the first drop.  Subsequent drops don't knock out as much.   I replace them on the mileage recommendations.  The interior cabin filters on the three newer cars get changed once a year. 
If you filter was really dirty, there might have been a slight increase in response. 

[FL SAAC]

Yes

Replacing your car's air filter regularly can help your engine run better and longer, and it can also improve fuel efficiency and reduce emissions.

A dirty or damaged air filter can limit the amount of air that reaches your engine, which can cause it to work harder and use more fuel.

This can lead to a decrease in miles per gallon. Over time, a dirty filter can also allow particles like grains of salt to reach internal engine parts, which can be expensive to repair.

[deathsled]

Sometimes the simplest things have the greatest favorable impact.  Check your air filters everyone as you see fit.