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I have noticed that my car does not need 9.5 quarts of fresh oil, even with a filter change... and yes, I warm the motor first and let it drain for a long time... sometimes overnight!
The way I do it now is to put 8 quarts in, idle the motor for a minute, wait 30 minutes, check it, add a cup of oil or so, and repeat the process.
The last three or four oil changes have not been more than 9 quarts... usually a little less.
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