Hello, totally new here an just avg.(or below) when it comes to cars. I have a 2012 Optima SX TURBO. Purchased brand new with 5 miles in 2012. No accidents never missed an oil change, and I currently have 86k miles. I’m lost and can’t figure out. Almost every day now for two weeks on my morning drive to work I accelerate and if I let go of gas to slow down and the re-accelerate my optima won’t accelerate its like its ina brief neutral and ill pump gas a couple of times and it’s all back to normal. Usually only happens on the morning drive. I just switched my air filter to a K&N and added sea foam to gas tank. Seems to have helped about 80%. I have never changed spark plugs on it, I have read a ton of you alls posts on different spark plugs I want the best for my car. My car is just used to an from work not for performance no mods nothing crazy. I just want it to run great with no lag. So my question is what spark plugs do you all recommend an where can I purchase I’ve looked at autozone and seen those Dyso and Bosh ones. Is the plug the only thing I should change or coils too? All you help and advise is greatly appreciated. From my understanding the spark plugs should be easy to change for a novice correct?