Emissions, Spark Plugs Hey all, i prepped her all day yesterday, swapping out bulbs, putting in new brake-wear sensors, taking the seats apart to get that annoying "no seatbelt" light off the dash, etc etc. Got to inspection, it looked promising. I watch the guy go sit in the car again, and i notice he doesn't scrape off my old sticker, he puts a rejected one over it. Damn. Emissions. I was off by a few points. Probably just need new plugs, since I have not changed them since I got the car. My question is: The plugs currently in my car are Bosch Platinum 4's. The kind with 4 lips on the bottom. I had my dad go to BMW today, since I had to work, to pick up some plugs, or find out what's recommended. I also told him to get the same ones, and check Autozone. He comes home with BMW NGK RI plugs. They have 2 lips on the bottom. Is there a real difference in performance/reliability? I know they'll work, but I'd rather have something better if I can get it. What are the best plugs for our cars? Thanks |