I know most of you hate these, figure out what's wrong with my car, when you havent event seen it, but... Sometimes when I am in first gear, before VTEC engagement, it feels like the car is slower then usual. Kinda like when a clutch slips, but I dont think its the clutch. My car has 19K miles on it, and its something that has been bothering me lately, friends say that I am getting used to it, thats all. Any info or common problems known would really be appreciated, before it actually is something serious. Thanks.

 

Just a couple things that ran through my head:
1) Mileage since last oil change?
2) Mileage since last diff change?
3) Spark plug condition?
4) Dirty air filter?
5) Lastly, it is getting warmer out, so the air is less dense compared to winter air.