You local tuner shop or online. You can find NGK products almost anywhere man.Where should I buy
Seriously? Do you do a lot of stop-and-go driving? That's me everyday in L.A. traffic.In addition to what Matt recommends, i'd like to add to make sure that you keep your tires properly inflated!
Idk, hopefully after replacing all those parts you'll gain some mileage because my car gives me 280-300+ miles on a tank regularly!
No wonder your mileage is kicking ass...Well I used to do a lot of stop-and-go back when my job required me to travel through rush hour traffic. Now I work in the total opposite direction. So when rush hour traffic is traveling south in the morning, i'm actually going north. Conversely, during the evening when rush hour traffic is going north, i'm heading back south. Works out very well for me.
Plus I live in the sububs so a lot of times the roads are open. From a stop light i'll gradually accelerate to cruising speed(usually between 30-50mph) and not have to really slow or stop until I encounter another red light. So basically the most stop-and-go i'm doing is when I get caught at traffic lights.