oil burner

[robmtb93]

so i have yet another issue with mine, aside from its tendency to eat turbos, its now drinking oil, start up its fine, alot better than when i first got it, but not as good as it has been, but now its puffing out smoke everytime i put my foot down, clears normally til your going at a constant speed then puffs a little bit out, then clears for 2 seconds, then puffs a little bit more out, just comes out, looks like fogs decended on the rear screen then clears again til 2 sec later, anyway, get onto a duelly and put my foot down, when the turbo properly starts to boost, i have so much smoke gush out the back, its like watching all other car headlamps turn into candle lanterns, then clears and its fine til i stop for another roundabout -_- this is basingstoke, its clear for a while, then must build up again over time ready for another dose of fog behind me, it did clear for a few days, and stays clear if oil is kept a couple of mm above miniumum, fill her up though and smoke comes forth again, also seems to have a lot of pressure released when opening the oil filler cap, it almost pops off, any ideas, help please guys?