I've just given up smoking, and my vento just started!!! '92 vento obd1 141,000 miles. Getting huge clouds of blue smoke now and again, when i set off from a start, especially if i've been following sunday drivers. Also, when abiding the speed limits, i get a blue haze following me , for a few seconds, but not that often. I'm using magnetec 5w 30 oil from halfrauds, as told to by VWbolton!!!! Could this be too thin, Hoping for the best!