hey guys my 1988 7mgte supra is smokeing lots of blue smoke and is misfiring badly. i was on the highway for a while and the car shut off on me. i was only going like 110 and i pull over popped the hood and there was smoke around the exhaust manifold, i heard a pop of air when i started it back up and it start to sound like it was running on 3 cyclinders. drove it home. there was some oil in the intake manifold and intercooler pipings. so i cleaned it out. checked the spark plugs and there was a bunch of oil on spark plug #2#3#4.changed the spark plugs started it up and the car dosent want to idle. i tried to step on the gas to make it stay and it dose , but it has massive power lost. the car still misfires and blue smoke comes out the exhaust. So i took off the whole intake manifold cleaned it and clean the intercooler piping changed the spark plugs again due to more oil and started it back up. the car Still misfires on cylinder 2 and 3 whatsoever.i usualy dont like coming here for help and i searched it up and some said it could be turbo seals but the car keeps misfiring. this all happened when i changed the oil to 5w30 royal purple.Also there is strong puffs of air coming out the engine oil cap when i open it. plz help i dont know what to do, im thinking about replacing the turbo but i dont know if i should, the old turbo dosent have much play so idk.(sorry for speeding and stuff but this never happened untill the oil changed, i blame the 5w30)