So I have a gm sc ecotec sunfire that was pushing 10psi. Recently it's dropped to about 9.5-9.8psi.

Could it be because of the much warmer weather? Has my engine suffered some kind of damage that i don't know about? Is my sc starting to show age already? (it's been on about 15k that were mostly highway)

Btw my car currently has stock airbox with drop in k&n. I will be cutting up and putting on an AEM CAI when the snow is 100% gone. Also will the intake add a bit of boost or will it drop even more...AEM also states it adds like 3 or something horsepower to a stock engine, anyone have a guestimate of what it would add with the sc on our engine's?

Sorry for all the questions, haha :p