How much oil does your h2 burn?

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And to answer your question on dino vs synthetic:

Do I have to use special oil?
The GM Oil Life Monitor System is calibrated for use with standard ?Starburst? mineral based automotive engine oil. Synthetic oils are not required except for the Corvette. Make sure to read the owner?s manual and select the viscosity and oil grade that is correct for your engine. Any oil selected for use should carry the ILSAC ?Starburst?.

[Egan]

Here's a pdf with all of the oil system FAQ's