4.8is oil consumption and blue smoke at oil cap

[electricalserv x5]

Hi Guys , looking from the oil cap on my 06 4.8is with 69k miles on her.
1] should it be burning oil of a quart every 1500 miles? I notice the valves where rattling a bit too[ problem? only for 1500 miles]
2] check the oil today and there was blue smoke at the oil cap, it was a quart low, filed her up with syntech , all levels good.Could this damage the heads or engine ?
No black dust from exhust system. and rattle is gone. only been driving only 4 to 20 miles but have been try to put longer rides on her.........................
3] any one had any experience with this.............?

[4.8isX5]

I forgot where the page is, but if you search blue smoke symptoms you should come across it... from what i recall blue smoke coming from engine bay was the worst type of issue, your saying running itll come up from under the oil cap or??

Most 4.8is have smoke coming out tailpipe after longer idle ( after car is hot ), i had this same issue, would release a plume of smoke even 30-45 sec at a longer traffic light.

With the fixes i did, $50 or less, it now only smokes a tad, and thats after idleing it for 15 minutes while hot. Huge difference from before, not purposely idleing it that long to check, i never have smoke anymore at all driving/sitting at lights/ etc.

I think you should explain the smoke and how/when it comes from the engine bay, this is a more serious issue that needs to be addressed ASAP, versus the tailpipe smoke, can be remedied like i did for a few bucks and will not really affect much.

[ssx5]

Originally Posted by electricalserv x5

Hi Guys , looking from the oil cap on my 06 4.8is with 69k miles on her.
1] should it be burning oil of a quart every 1500 miles? I notice the valves where rattling a bit too[ problem? only for 1500 miles]
2] check the oil today and there was blue smoke at the oil cap, it was a quart low, filed her up with syntech , all levels good.Could this damage the heads or engine ?
No black dust from exhust system. and rattle is gone. only been driving only 4 to 20 miles but have been try to put longer rides on her.........................
3] any one had any experience with this.............?

Yes been there done that.
Need to replace oil separator. Had to do this in 2012.