Quote:
Originally Posted by Modshack
BS...Most manufacturers have a 1 Qt per 1000 mile reference before they'll even talk to you about a potential defect..
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That may be technically true, but no properly built and properly broken-in engine should ever consume nearly that much oil. Even engines I've built consumed at most a quart every 3500 miles, under very loose piston-to-cylinder wall and ring gap clearances and high specific output conditions (i.e. 23-25 psi of boost on a 3.0 L V6).
A modern OEM engine ought to never consume any noticeable amount of oil on a single OCI unless you're racing with it. If it does consume, there is most likely something "off" - probably poor break-in. It still gets me that manufacturers suggest an "easy" break-in when they know it's worse for the engine.