yes i put mobil one full syn back in it .. i use that on everything i have with mobil one filter. it has a volant intake on it which is dirty i just havent had time recently to clean it .. well im ordering a GREEN USA air filter for it.
would tuning a stock 6.0 help any? are you talking bout dyno tune or like the dioblo tuner plug and play?
Dyno tune, just to be sure. Technically with our cars you should always tune it after even adding a CAI, I mean, you probably won't blow anything up by adding catback/intake without tuning, but it leaves stuff on the table and throws your tables off.
Definitely clean that filter, is it the kind you can reoil up? Volant's aren't too
better then the LPE I have. Clean that sucker up, change plugs and wires and report back.
I've seen people gain 20hp on bone stock cars from a dyno tune. If anything it will let you know where your at and if everything is running right. You never know what the person did to the car before you so if the numbers don't match up to your vehicles modifications or lack thereof you will know something is wrong, it's pretty much just some reassurance for your car.
Our motors are pretty damn loud to begin with, never heard so much chatter in the valvetrain in my life before this car. Should sound similar to a big ass sewing machine. The A/C making noise is not
normal. Is it making a belt noise? Is it blowing cold air?
Mine feels sluggish too. It is because you are getting used to how powerful it really is. Add a mod here and there and you will enjoy it all over again.
He said he just got his, doubtful that it's because he's used to it by now.