All that blueish white smoke is oil fumes.
Well I tend to disagree.
When I started on the Tristar I worked in the Middle East. We didn't have masses of smoke out the back.
then I moved to Stockholm, and the TWA crews used to put the fuel/ign on at very low N3, and the smoke poured out. I have always thought it was unburnt fuel in the cold air.
Our SOP was to motor the engine to 10%N3 to motor that spool through a stall on each start.
That is what causes the smoke!.
After 6 years starting engines in BAH, we always ran the engine up to max N3, or at least 20pc N3, or we got a hot start.
In ARN we had a Tristar that only flew on weekends. So on Friday mornings we opened it up, and swept the snow out of the Nbr 2 intake and started it up. OAT around M10deg.It took about four minutes of starter motor before the starter cut out. Oil pressure off the clock high, and oil qty zero, and a fog bank behind us.
The problem with the -22 was that the fuel flow difference between no acceleration, and a stall was tiny. It seemed that we did mods to the start bleed system every 6 months. You never could remember which valve was controlled by which switch, and what the master sw did at the third detent. (except get you nearer to a hot start). With each new RB211 variant it gets better, and now the Trent 800 starts in seconds. (well 30 secs to idle).