07-16-2010, 09:14 AM
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#10 (permalink)
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Enthusiast Member
Join Date: Aug 2009
Location: New Bern
Posts: 252
Drives: 9 370z SptCp SRd 7AT
Rep Power: 16
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Quote:
Originally Posted by WarmAndSCSI
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.
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Exactly. I wasn't referring to some arbitrary cya spec by the manufacturer, who makes those to save themselves from warranty claims. As warmandscsi said above, a properly made modern engine ( when street driving) shouldn't lose oil of any noticeable amount between changes. If it does, you have some sort of defect, or a poor break-in. My 92 explorer loses a quart of oil every 5k miles, and that engine has 170k on it.
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