I believe Mobil has reformulated the Supersyn recently. I know flash point is not everything but a couple of months ago I distinctly remember the flash point of the either 5/30 or 10/30 to be 425 F. Now, revision date on the Mobil site of August,2002 shows the oil to have a flash point of 455 F.I am having trouble getting the MSDS on the moly they use in number 48117-6 oil which is the 10/30 Supersyn. If anyone can post this,I would be greatfull