Hi there,
Thank you for the donation.
There is only two ways that the engine can use oil, external leaks and burning, this is a lot of oil to be using, if it was an external leak it would be dripping of the engine, if this is not the case it is burning it, but for such large quantities to be burning there would be evidence of smoking, check both these items and let me know what you see, also what grade oil are you using and is it mineral or synth?
Mark (mhpautos)
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Friday, November 13th, 2009 AT 5:14 PM