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Mine went from 1qt every 3000 miles 1 qt every 800 miles or so over the course of 10 years and 180000 miles + countless track days. It runs just as well now as it did then, though, it just eats up more oil, so I vote for tired rings and looser tolerances too...
At the end of the day, regardless of the reason why (valves, layout, tolerance), your choice is a $6000 top end rebuild with a 50/50 chance of success (by that I mean some rebuilt engines still eat more oil than others) or adding $3 of oil every now and them ! ;-) Tough choice.... I think I'd still pick adding oil if it were 1qt every 300 miles ;-) as long as performance is there anyway...
Interesting topic as to the cause though....
Last edited by Deschodt; 09-18-2008 at 10:42 AM..
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