Topped up oil this morning and after 30 mins. of driving engine started running rough, smelt burning oil, blue smoke, car idling at 2000 revs. and temperature gauge at bottom. Got car home, took some oil out (at least what I put in ), car started fine, ran fine for about 5 miles and then same problems and when stopped doesn't want to start again.( only way to start it is with foot flat on accelerator). Any ideas before I go in to dealers tomorrow.