Just wondering if its the valve seals or piston rings... When I first fire up my car I get a puff of blue smoke... Also, when I pull away from a stop light there is another puff of blue smoke... So I'm burning oil obviously... The supra has 150000 miles on it and I use 10w30 full synthetic...But is it bad to keep driving my car like this? Or is it ok as long is I keep an eye on the oil level?