Just a quick question

Right as you might be aware i took my car for mot last tuesday and thats weres its been all week having the brakes pipes done. so with a new mot today rather than take her home the two mile journey it took me 14 miles home to get the feel of her again after all these years. i did stop of at the local wilco stores and poued in a bottle hydrolic tappat lifter stuff cas one was a bit tappy when cold . then when on way thought id give her a little boot and i have a little blue smoke puff out the back. now the oil is new and coulnt give it any beans round the ring road. when fininished givent the beans done the last couple miles norm then ran the car for two mins before flicking the throtlle twice. and had no smoke .so am i to asume that the stuff i put in the oil slowly burns off deposit from the valve seats so they sit better and thats pos why the smoke ? dont smoke on idel or norm driving only after some beans whilst on boost. and after putting that stuff in . home now and cant take car out again tell friday payday to tax her. just a thought. any thoughts ideas welcome. though felt great i think im going to have to learn how to drive her again.