Running in cosy engine at mo,just a bit concerned,when i start car from cold,no smoke,when blipping no smoke,if i leave car ticking over for 5 minutes or so,then give it a rev,a puff of blue smoke,clears straight away.no smoke when driving,or on overrun,only when left ticking over for a while.Any ideas,could the turbo be letting by,could the oil feed union be to big in top of turbo.Its a new turbo.The only thing that i did not change was the valves.I still have a crap mineral oil in at the mo.
Any ideas,thanks matt