smoke at start-up

[jefla]

I've a "00 2.7 L w/ 40k miles and a very good service history, including oil changes annually (<15k mi) using Mobil 1 0w40. The engine runs very well but mine is one that has horrible lifter clatter at start-up, after sitting for as little as overnight. (Sound makes me cringe, but I've read the posts so I don't worry.) Twice in the 15 months I've owned the car (2d owner) it has also given a rather large puff of blue smoke at startup (but not after winter storage). I worry about the smoke.

Is there anything I can do to stop all this clatter and occasional smoke, e.g. switch to 10 or 20w40, or is there anything else I should watch for?

TIA

[number9ine]

I've a "00 2.7 L w/ 40k miles and a very good service history, including oil changes annually (<15k mi) using Mobil 1 0w40.  The engine runs very well but mine is one that has horrible lifter clatter at start-up, after sitting for as little as overnight.  (Sound makes me cringe, but I've read the posts so I don't worry.)  Twice in the 15 months I've owned the car (2d owner) it has also given a rather large puff of blue smoke at startup (but not after winter storage).  I worry about the smoke.

Is there anything I can do to stop all this clatter and occasional smoke, e.g. switch to 10 or 20w40, or is there anything else I should watch for?

TIA

<{POST_SNAPBACK}>

Bump for smokin' Boxster. I read somewhere that it's because a small amount of oil will pool in the cylinder head when the car sits, and burn off after ignition. I park mine on a hill, and occasionally when I start it there's a puff of white smoke, but no irregular valve noise as jefla has. I park uphill, and I wonder if that has something to do with it?