Oil smoke - any suggestions please

[sticks090460]

Went for run in my 996 C4S Tip this morning. Drove for about an hour, mixture of motorways, A- and B- roads. Stopped for about 5 minutes, then started to head home. 2 or so minutes poodling along back road, then waiting to get onto dual carriageway. Traffic moving fast but saw a big enough gap and floored it; look in mirror to see huge cloud of oil smoke, which slightly cleared, then another big puff as I lifted. Then no more smoke. Settled into 70 "cruise" and checked instruments - no red lights, nothing on the OBC, normal oil pressure, everything as normal. I then drove the 50 miles or so home, and no amount of provocation on the way could generate a repeat, engine running absolutely sweetly from tick-over to red line.
I'm tempted to forget about it, but grateful for any suggestions as to what might have caused it.

[burman]

Hi sticks, What colour was the smoke? if it was white I had a similar experience at a Castle Coombe trackday a couple of years ago on a very hot day,and driving at 7/8 tenths.
Nothing to worry about and there has been some earlier threads on here on the same subject which i am sure the IT geeks on here will repost as I cant be arsed as I have had a few jars this morning. Cheers Roy

[sportsandclassic]

Hi, it could be the start of an oil to air seperator failing. See if it happens again and if so get it checked out.

[sticks090460]

Roy - smoke was white. Thanks for reassurance. Tried search function but all I got was threads about smoke on start-up.
Sportsandclassic - any test for an OAS problem that a non-mechanic could perform?