They have been there primarily for appearance, but lately (esp with the direct injection engines like the 3.6) the injector noise is high enough that the shrouds do help. However, you can safely run without them.As an aside to this post... the new car trend of covering everything up with all the plastic shrouding has always bugged me. Is there any downside to removing it all and just storing it somewhere safe? Does it provide any noticeable acoustic damping or anything, or is it just for that "clean" underhood look?
Interesting, So, I just bought my car about 2/3 months ago and I was going on the fact of the DIC reading with engine oil life. that could be wrong?? I think I'll go get an oil change done just to be safe.Scroll through the DIC until you get to the engine oil life reading, then hold down the reset button for several seconds and then it will reset to 100%. The reset button is the same one that reset everything else in the DIC... i.e. the trip odometers, avg mpg, etc.