Smoking 4.4i - what worked for you?

[edogg]

I bought my 2006 4.4i back in February with 73k miles as my daily driver. My commute is about 20 miles each way with open freeway. It passed PPI with no mechanical issues.

About 2k miles in, I did my first oil change (75k miles makes it easy to keep track of 5k increments). Afterward, I noticed that after sitting at stoplights and in drive-throughs, I'd leave a cloud of blue smoke behind me when accelerating away. So I'm thinking that someone before me (either previous owner or dealership) used something to hide the smoking.

On my next oil change, I had the shop do some diagnosis. They pressure tested the engine and found the CCVs to be clogged up so replaced them. They said to give it a few weeks to see if the smoking stops and it hasn't.

So while I save up for a few months for what I expect to be a pretty expensive service, I'd like to try temporarily hiding the smoke again.

The shop suggested using a heavier oil so I plan to use some synthetic 0w40 or 10w40 Valvoline or Castrol (probably the 0w40) in my next oil change.

Did a heavier oil help your smoking N62? Have you tried one of the million oil additives and had success without causing other problems?