what would be the main causes of power loss?

my 202 just doesn't have the same kick it did a week ago

is there anything I should have checked?


it's a 94, i just bought it 3-4 months ago, i added a CAI, i just changed from castrol high mileage 10w40 to mobil 1 0w 40, it has about 186k on it now, i drive a lot i've done about 6k miles in those 3 months